The temperature rises periodically. Causes of periodic or constant slight increase in body temperature

Body temperature is one of the most important physiological parameters indicating the state of the body. Since childhood, we all know well that the normal body temperature is +36.6 ºC, and a temperature increase of more than +37 ºC indicates some kind of disease.

High temperature danger

What is the reason for this state of affairs? An increase in temperature is an immune response to infection and inflammation. The blood is saturated with temperature-raising (pyrogenic) substances produced by pathogenic microorganisms. This, in turn, stimulates the body to produce its own pyrogens. The metabolism speeds up somewhat to make it easier for the immune system to fight the disease.

Usually, fever is not the only symptom of the disease. For example, with colds, we feel typical symptoms for them - fever, sore throat, cough, runny nose. With mild colds, body temperature can be at the level of +37.8 ºC. And in case of severe infections, such as influenza, it rises to + 39-40 ºC, and aches all over the body and weakness can be added to the symptoms.

Photo: Ocskay Bence / Shutterstock.com

In such situations, we know very well how to behave and how to treat the disease, because its diagnosis is not difficult. We gargle, take anti-inflammatory drugs and antipyretics, if necessary - drink, and the disease gradually disappears. And after a few days the temperature returns to normal.

Most of us have faced this situation more than once in our lives. However, it happens that some people experience slightly different symptoms. They find that their temperature is higher than normal, but not by much. We are talking about subfebrile condition - a temperature in the range of 37-38 ºC.

Is this condition dangerous? If it does not last long - within a few days, and you can associate it with some kind of infectious disease, then no. It is enough to cure him, and the temperature will drop. But what if there are no visible symptoms of a cold or flu?

Here it must be borne in mind that in some cases, colds can have erased symptoms. Infection in the form of bacteria and viruses is present in the body, and the immune forces react to their presence with an increase in temperature. However, the concentration of pathogenic microorganisms is so low that they are unable to cause typical cold symptoms - cough, runny nose, sneezing, sore throat. In this case, the fever may pass after these infectious agents die and the body recovers.

Especially often, such a situation can be observed in the cold season, during epidemics of colds, when infectious agents can attack the body over and over again, but stumble upon the barrier of the embattled immunity and not cause any visible symptoms, except for an increase in temperature from 37 to 37 ,5. So if you have 4 days 37.2 or 5 days 37.1, and you feel tolerable, this is not a cause for concern.

However, it is known to rarely last more than one week. And, if the fever lasts more than this period and does not subside, and no symptoms are observed, then this situation is a reason to seriously think about it. After all, permanent low-grade fever without symptoms can be a harbinger or a sign of many serious diseases, much more serious than the common cold. These can be diseases of both infectious and non-infectious nature.

Measurement technique

However, before you worry in vain and run around the doctors, you should exclude such a banal cause of subfebrile condition as a measurement error. After all, it may well happen that the cause of the phenomenon lies in a faulty thermometer. As a rule, electronic thermometers, especially cheap ones, are guilty of this. They are more convenient than traditional mercury ones, however, they can often show incorrect data. However, mercury thermometers are not immune from errors. Therefore, it is better to check the temperature on another thermometer.

Body temperature is usually measured in the armpit. Rectal and oral measurements are also possible. In the last two cases, the temperature may be slightly higher.

The measurement should be carried out while sitting, in a calm state, in a room with a normal temperature. If the measurement is taken immediately after intense physical exertion or in an overheated room, then the body temperature in this case may be higher than normal. This circumstance should also be taken into account.

One should also take into account such a circumstance as temperature changes during the day. If in the morning the temperature is below 37, and in the evening - the temperature is 37 and slightly higher, then this phenomenon may be a variant of the norm. For many people, the temperature may vary somewhat during the day, rising in the evening and reaching values of 37, 37.1. However, as a rule, the evening temperature should not be subfebrile. In a number of diseases, a similar syndrome, when the temperature is above normal every evening, is also observed, therefore, in this case, it is recommended to undergo an examination.

Possible causes of prolonged subfebrile condition

If you have a fever without symptoms for a long time, and you do not understand what this means, you should consult a doctor. Only a specialist after a thorough examination can say that this is normal or not, and if abnormal, then what caused it. But, of course, it is not bad to know for yourself what can cause such a symptom.

What conditions of the body can cause prolonged subfebrile condition without symptoms:

norm variant
hormonal changes during pregnancy
thermoneurosis
temperature tail of infectious diseases
oncological diseases
autoimmune diseases - lupus erythematosus, rheumatoid arthritis, Crohn's disease
toxoplasmosis
brucellosis
helminthic infestations
latent sepsis and inflammatory processes
foci of infection
thyroid disease
drug therapy
intestinal diseases
viral hepatitis
Addison's disease

Norm variant

Statistics say that 2% of the world's population has a normal temperature slightly above 37. But if you do not have a similar temperature since childhood, and subfebrile condition has appeared only recently, then this is a completely different case, and you are not included in this category of people.

Photo: Billion Photos/Shutterstock.com

Pregnancy and lactation

Body temperature is regulated by hormones produced in the body. At the beginning of such a period of a woman's life as pregnancy, the body is restructured, which, in particular, is expressed in an increase in the production of female hormones. This process can cause overheating of the body. As a general rule, a temperature around 37.3ºC for pregnancy should not cause serious concern. In addition, subsequently, the hormonal background stabilizes, and subfebrile condition disappears. Usually, starting from the second trimester, a woman's body temperature stabilizes. Sometimes subfebrile condition can accompany the entire pregnancy. As a rule, if fever is observed during pregnancy, then this situation does not require treatment.

Sometimes subfebrile condition with a temperature of about 37.4 can also be observed in women who are breastfeeding, especially in the first days after the appearance of milk. Here the cause of the phenomenon is similar - fluctuations in hormone levels.

Thermoneurosis

Body temperature is regulated in the hypothalamus, one of the parts of the brain. However, the brain is an interconnected system and processes in one part of it can affect another. Therefore, such a phenomenon is very often observed when, in neurotic states - anxiety, hysteria - the body temperature rises above 37. This is also facilitated by the production of an increased amount of hormones during neuroses. Prolonged low-grade fever can accompany stress, neurasthenic conditions, and many psychoses. With thermoneurosis, the temperature, as a rule, normalizes during sleep.

To exclude such a reason, it is necessary to consult a neurologist or psychotherapist. If you really have a neurosis or an anxiety condition associated with stress, then you need to undergo treatment, since loose nerves can cause much more problems than low-grade fever.

Temperature "tails"

You should not discount such a banal reason as a trace of a previously transferred infectious disease. It is no secret that many influenzas and acute respiratory infections, especially severe ones, lead the immune system into a state of increased mobilization. And in the event that infectious agents are not completely suppressed, then the body can maintain an elevated temperature for several weeks after the peak of the disease. This phenomenon is called a temperature tail. It can be observed in both adults and children.

Photo: Aleksandra Suzi/Shutterstock.com

Therefore, if the temperature is + 37 ºС and above for a week, then the causes of the phenomenon may lie precisely in the previously transferred and cured (as it seemed) disease. Of course, if you had been ill shortly before the detection of a constant subfebrile temperature with some kind of infectious disease, then there is nothing to worry about - subfebrile condition is precisely its echo. On the other hand, such a situation cannot be called normal, since it indicates the weakness of the immune system and the need to take measures to strengthen it.

Oncological diseases

This reason also cannot be discounted. Often it is subfebrile condition that is the earliest sign of a tumor that has appeared. This is explained by the fact that the tumor releases pyrogens into the blood - substances that cause an increase in temperature. Especially often subfebrile condition accompanies oncological diseases of the blood - leukemia. In this case, the effect is due to a change in the composition of the blood. To exclude such diseases, it is necessary to undergo a thorough examination and take a blood test. The fact that a persistent increase in temperature can be caused by such a serious disease as cancer makes us take this syndrome seriously.

Autoimmune diseases

Autoimmune diseases are caused by an abnormal response of the human immune system. As a rule, immune cells - phagocytes and lymphocytes attack foreign bodies and microorganisms. However, in some cases, they begin to perceive the cells of their body as foreign, which leads to the appearance of the disease. In most cases, connective tissue is affected.

Almost all autoimmune diseases - rheumatoid arthritis, systemic lupus erythematosus, are accompanied by an increase in temperature to 37 and above without symptoms. Although these diseases usually have a number of manifestations, they may not be noticeable at an early stage. To exclude such diseases, it is necessary to be examined by a doctor.

Toxoplasmosis

Toxoplasmosis is a very common infectious disease that often occurs without noticeable symptoms, except for fever. It often affects pet owners, especially cats, which are carriers of bacilli. Therefore, if fluffy pets live in your home and the temperature is subfebrile, then this is a reason to suspect this disease. Also, the disease can be contracted through poorly fried meat. To diagnose toxoplasmosis, a blood test should be taken to check for the infection. You should also pay attention to symptoms such as weakness, headaches, loss of appetite. The temperature in toxoplasmosis is not knocked down with the help of antipyretics.

Brucellosis

Brucellosis is another disease caused by an infection transmitted through animals. But this disease most often affects farmers who deal with livestock. The disease in the initial stage is expressed in a relatively low temperature. However, as the disease develops, it can take on severe forms, affecting the nervous system. However, if you do not work on a farm, then brucellosis can be ruled out as a cause of hyperthermia.

Tuberculosis

Alas, consumption, infamous from the works of classical literature, has not yet become part of history. Tuberculosis currently affects millions of people. And this disease is now characteristic not only for places not so remote, as many believe. Tuberculosis is a severe and persistent infectious disease that is difficult to treat even with the methods of modern medicine.

However, the effectiveness of treatment largely depends on how quickly the first signs of the disease were detected. Subfebrile condition without other clearly expressed symptoms belongs to the earliest signs of the disease. Sometimes temperatures above 37 ºC may not be observed all day, but only in the evening. Other symptoms of tuberculosis include increased sweating, fatigue, insomnia, and weight loss. To accurately determine if you have tuberculosis, you need to perform a tuberculin test (), as well as do a fluorography. It should be borne in mind that fluorography can only detect the pulmonary form of tuberculosis, while tuberculosis can also affect the genitourinary system, bones, skin and eyes. Therefore, relying only on this diagnostic method should not be.

AIDS

About 20 years ago, the diagnosis of AIDS meant a sentence. Now the situation is not so sad - modern drugs can support the life of an HIV-infected person for many years, or even decades. It is much easier to get infected with this disease than is commonly believed. This disease affects not only representatives of sexual minorities and drug addicts. You can pick up the immunodeficiency virus, for example, in a hospital with a blood transfusion, with accidental sexual contact.

Permanent low-grade fever is one of the first signs of the disease. Note. that in most cases, the weakening of the immune system in AIDS is accompanied by other symptoms - increased susceptibility to infectious diseases, skin rashes, impaired stools. If you have reason to suspect AIDS, you should immediately consult a doctor.

Worm infestations

Latent sepsis, inflammatory processes

Often, an infection in the body can be latent, and not show any signs other than fever. The foci of a sluggish infectious process can be located in almost any organ in the cardiovascular system, gastrointestinal tract, bone and muscle systems. The organs of urination are most often affected by inflammation (pyelonephritis, cystitis, urethritis). Often, subfebrile condition can be associated with infective endocarditis, a chronic inflammatory disease that affects the tissues surrounding the heart. This disease can be latent for a long time and not manifest in any other way.

Also, special attention should be paid to the oral cavity. This area of the body is especially vulnerable to the effects of pathogenic bacteria, since they can enter it regularly. Even a simple untreated caries can become a focus of infection that will enter the bloodstream and cause a constant protective response of the immune system in the form of fever. The risk group also includes patients with diabetes mellitus, who may experience non-healing ulcers that make themselves felt through fever.

Thyroid diseases

Thyroid hormones, such as thyroid-stimulating hormone, play an important role in regulating metabolism. Some thyroid diseases can increase the release of hormones. An increase in the amount of hormones can be accompanied by symptoms such as increased heart rate, weight loss, hypertension, inability to tolerate heat, worsening hair condition and fever. Nervous disorders are also observed - increased anxiety, restlessness, absent-mindedness, neurasthenia.

An increase in temperature can also be observed with a lack of thyroid hormones.

To exclude an imbalance of thyroid hormones, it is recommended to take a blood test for the level of thyroid hormones.

Addison's disease

This disease is quite rare and is expressed in a decrease in the production of hormones by the adrenal glands. It develops for a long time without any special symptoms and is also often accompanied by a moderate increase in temperature.

Anemia

A slight increase in temperature can also cause a syndrome such as anemia. is called a lack of hemoglobin or red blood cells in the body. This symptom can manifest itself in various diseases, it is especially characteristic of severe bleeding. Also, an increase in temperature can be observed with some beriberi, lack of iron and hemoglobin in the blood.

Medical treatment

At subfebrile temperature, the causes of the phenomenon may be medication. Many medications can cause fever. These include antibiotics, especially penicillin drugs, some psychotropic substances, in particular neuroleptics and antidepressants, antihistamines, atropine, muscle relaxants, narcotic analgesics. Very often, an increase in temperature is one of the forms of an allergic reaction to the drug. Perhaps the easiest way to check this version is to stop taking the medicine that causes suspicion. Of course, this should be done with the permission of the attending physician, since drug withdrawal can lead to much more serious consequences than low-grade fever.

Age up to a year

In infants, the causes of subfebrile temperature may lie in the natural developmental processes of the body. As a rule, in a person in the first months of life, the temperature is slightly higher than in adults. In addition, infants may experience violations of thermoregulation, which is expressed in a low subfebrile temperature. This phenomenon is not a symptom of pathology and should go away on its own. Although with an increase in temperature in infants, it is still better to show them to a doctor to rule out infections.

Intestinal diseases

Many infectious intestinal diseases can be asymptomatic, except for an increase in temperature above normal values. Also, a similar syndrome is characteristic of some inflammatory processes in diseases of the gastrointestinal tract, for example, in ulcerative colitis.

Hepatitis

- severe viral diseases that affect the liver. As a rule, prolonged subfebrile condition accompanies sluggish forms of the disease. However, in most cases, it is not the only symptom. Usually, hepatitis is also accompanied by heaviness in the liver, especially after eating, yellowness of the skin, pain in the joints and muscles, and general weakness. If hepatitis is suspected, a doctor should be consulted as soon as possible, since timely treatment reduces the likelihood of severe, life-threatening complications.

Diagnosis of the causes of prolonged subfebrile condition

As you can see, there are potential causes that can cause a violation of the thermoregulation of the body. great amount. And it's not easy to find out why it happens. This can take a lot of time and require a lot of effort. However, there is always something from which such a phenomenon is observed. And an elevated temperature always says something, usually that something is wrong with the body.

Photo: Room's Studio/Shutterstock.com

As a rule, at home it is impossible to establish the cause of subfebrile condition. However, some conclusions about its nature can be drawn. All the reasons that cause fever can be divided into two groups - associated with some kind of inflammatory or infectious process and not associated with it. In the first case, taking antipyretic and anti-inflammatory drugs such as aspirin, ibuprofen or paracetamol can restore normal temperature, albeit not for long. In the second case, taking such drugs does not give any effect. However, one should not think that the absence of inflammation makes the cause of subfebrile condition less serious. Conversely, non-inflammatory causes of low-grade fever can include such serious things as cancer.

As a rule, diseases are rare, the only symptom of which is subfebrile condition. In most cases, other symptoms are also present, such as pain, weakness, sweating, insomnia, dizziness, hypertension or hypotension, pulse disturbances, and abnormal gastrointestinal or respiratory symptoms. However, often these symptoms are erased, and a simple person is usually not able to determine the diagnosis from them. But for an experienced doctor, the picture may be clear. In addition to your symptoms, tell your doctor about your recent activities. For example, did you communicate with animals, what foods did you eat, did you travel to exotic countries, etc. When determining the cause, information about the patient's previous diseases is also used, because it is quite possible that subfebrile condition is the result of a relapse of some long-treated disease.

To establish or clarify the causes of subfebrile condition, it is usually necessary to pass several physiological tests. The first is a blood test. In the analysis, one should, first of all, pay attention to such a parameter as the erythrocyte sedimentation rate. An increase in this parameter indicates an inflammatory process or infection. Also important are parameters such as the number of leukocytes, hemoglobin levels.

To detect HIV, hepatitis, special blood tests are needed. Urinalysis is also necessary, which will help determine if there are any inflammatory processes in the urinary tract. At the same time, attention is also paid to the number of leukocytes in the urine, as well as the presence of protein in it. To cut off the likelihood of helminthic invasions, a fecal analysis is performed.

If the analyzes do not allow to unambiguously determine the cause of the anomaly, then studies of the internal organs are carried out. For this, various methods can be used - ultrasound, radiography, computed and magnetic tomography.

A chest x-ray can help identify pulmonary tuberculosis, and an ECG can help identify infective endocarditis. In some cases, a biopsy may be indicated.

Establishing a diagnosis in the case of subfebrile condition can often be complicated by the fact that the patient may have several potential causes of the syndrome at once, but it is not always easy to separate the true causes from the false ones.

What to do if you find yourself or your child has a persistent fever?

Which doctor should I contact with this symptom? The easiest way is to go to a therapist, and he, in turn, can give a referral to specialists - an endocrinologist, an infectious disease specialist, a surgeon, a neuropathologist, an otolaryngologist, a cardiologist, etc.

Of course, subfebrile temperature, unlike febrile temperature, does not pose a danger to the body and therefore does not require symptomatic treatment. Treatment in such a case is always aimed at eliminating the hidden causes of the disease. Self-medication, for example, with antibiotics or antipyretics, without a clear understanding of the actions and goals is unacceptable, since it can not only be ineffective and blur the clinical picture, but also lead to the fact that the real disease will be launched.

But from the insignificance of a symptom it does not follow that it should not be paid attention to. On the contrary, subfebrile temperature is a reason to undergo a thorough examination. This step cannot be postponed until later, reassuring yourself that this syndrome is not dangerous to health. It should be understood that behind such a seemingly insignificant malfunction of the body, there can be serious problems.

Crying, high fever, medicines, injections - all this causes great anxiety in parents. It's good when a doctor can make a correct diagnosis. However, sometimes there are situations when a high temperature rises without symptoms in a child. This leads to the fact that it is very difficult to find the reason for this.

Overheat

In babies, the temperature may rise due to normal overheating. However, it can sometimes happen to older children as well. Parents of infants should remember that their thermoregulation process is still very imperfect. With prolonged exposure to the sun or in a stuffy, hot room, a high temperature can rise without symptoms in a child. Especially if the baby does not drink enough liquids. Therefore, the main help will be to "cool" the baby and provide him with plenty of fluids.

Hyperexcitability

Sometimes neuralgic causes, namely the increased excitability of the baby, can lead to the appearance of the described reaction. Especially if the baby itself is very active. Therefore, worries, unjustified punishment, and even preparation for school can lead to the fact that a high temperature appears without symptoms in a child. Sometimes even loud noises, bright lights, can cause this phenomenon. In this case, parents can help the child by eliminating the cause of the fever.

Allergic reaction

Interestingly, allergies are not always manifested by sneezing, rashes, and swelling known to us. Sometimes its manifestations can be detected in the fact that a high temperature rises without symptoms in a child. In this case, the help of parents may be to eliminate the allergen and contact a specialist, since in the future these reactions may become more severe.

Having a severe illness

Sometimes asymptomatic fever occurs if the baby has a heart disease or leukemia. These diseases are often accompanied by jumps in temperature rise. This is usually due to both subjective and objective reasons. Therefore, such children are not recommended to be subjected to changes in climate, however, not excluding their hardening from infancy.

Infection

Many inflammatory diseases in the body of a child begin with the fact that a high temperature appears in a child without symptoms of any disease. Thus, the body tries to cope with the viruses and bacteria that have penetrated into it. Usually, if he fails to cope with them on his own, for example, cough, snot appear. This usually happens the day after the temperature rises. It is necessary to immediately consult a doctor, because often the cause of fever is hidden inflammatory processes that do not give visible manifestations.

Pyrogenic reaction

Most often, it occurs when non-physiological substances enter the body. An example would be a regular routine vaccination. At the same time, in some children the same vaccine does not cause any reaction, while in others it leads to hyperthermia. The same reason can lead to the fact that a high temperature rises without symptoms in an adult. However, this phenomenon is much more common in children. It is worth knowing that if the baby has it less than 38 °, then it is not worth knocking it down. At higher rates, it is possible to use antipyretic drugs, but their intake must be agreed by the doctor, since the use of low-quality drugs or their misuse can also cause a pyrogenic reaction.

fb.ru

Intermittent fever without other symptoms.

A child (1.4) has already had a fever several times over the past 4 months, somewhere up to 38 with absolutely no additional symptoms (no runny nose, no cough, nothing). Lasted 3 days and fell without a trace. Each time we explained this by acclimatization (just in time it coincided with moving from the sea, then to the sea, etc.). But now there is no acclimatization, and again it rose to 38 in the evening. A week ago, two new teeth came out, but they have already come out, so, probably, it didn’t rise from the teeth? There are no more erupted teeth yet. I don't know what to think. Teeth? Something terrible? The blood test last time was only in May. We'll come home, hand over again, of course. But if someone has had this happen, please share your experience! Tags: child's teeth, temperature

malyshi.livejournal.com

Temperature in an asymptomatic child

Colds, flu, chickenpox, pneumonia, meningitis are some of the many diseases in which there is an increase in body temperature. In addition, nausea, vomiting, rash, diarrhea and other symptoms of the disease that are unpleasant for the body may appear. In this case, the cause of the high temperature is clear.

But sometimes the temperature rises in a child without symptoms. In this case, it is much more difficult to determine the cause of its fluctuation, since the appearance of a person does not change much. To determine the exact diagnosis, it is necessary to pass all the required tests, since an increase in temperature may indicate various types of diseases that go unnoticed for a long time.

The main reasons for the increase in temperature in a child without symptoms may be the following:

Congenital heart disease. With this disease, sharp jumps in body temperature can be observed, which are dangerous for the baby's heart. Most often they are associated with a sharp change in climate. Therefore, such children from a very early age need to be hardened.
In a child, the temperature without symptoms may increase if a foreign body is present in the child's body. For example, a splinter that can inflame the skin and rot. The sooner you remove it from the body, the faster the discomfort will pass.
Overheating. This is especially true for children who are breastfed, as mothers often refuse to give additional water to the child. And if the baby is heavily wrapped, then thermoregulation is enhanced, moisture evaporates, and there is no source of water other than milk. Therefore, dehydration may even occur. Therefore, one of the most important rules for caring for a baby is the correct (according to the weather) dressing of the child.
Children with an overly excitable nervous system may also experience an increase in temperature without symptoms. The reason for its sharp jump can be even such insignificant, at first glance, factors as a sharp sound, light, that is, everything that can frighten a baby. Your task is to eliminate the causes of irritating factors as much as possible.
Allergy. We are used to the fact that allergies most often manifest themselves in the form of a rash or sneezing. But that's not all. One of its manifestations may be the high body temperature of the child. Basically, such a reaction occurs on drugs. Therefore, always read the instructions before use.
The beginning of the inflammatory process. Its symptoms can be pain and heat in the inflamed organ, which leads to the appearance of temperature. The thing is that the body is trying to fight pathogenic microbes with the help of heat, since they die in it.
A child with a fever without symptoms may appear after routine vaccinations. Most often, this phenomenon is observed in infants. Although every child experiences it in their own way. For some, adaptation to the injection passes without a trace, while someone suffers from a temperature for several days. This once again proves that there are no organisms identical to each other. In this case, you will have to be patient if there are no absolute contraindications for this, since now you can’t do without vaccination.
Angina. Often, with a sore throat, the throat does not immediately turn red, so neither the mother nor the doctors can immediately determine what is the reason for the increase in temperature. And only after some time a sore throat appears, and only then everything becomes clear. But when you establish the cause, it is in your power to eliminate it as soon as possible.

If a child has a fever without symptoms quite often, then it must be shown to the doctor, as this may be one of the signs of an incipient disease. And the sooner you start treatment, the more chances for a speedy recovery.

Dear readers of our site! Carefully check the indicated emails, comments with non-existent emails are ignored. Also, if you duplicate comments on several sites, we will not respond to such comments, they will simply be deleted!

zdorovye-rebenka.ru

When an adult develops a high temperature without symptoms, it is always a concern, because temperature, as one of the body's reactions, does not arise from scratch. However, the absence of any symptoms is frightening, since it is impossible to immediately determine the cause of such a condition.

The optimal temperature indicator for normally occurring processes in the human body is 36.6 ° C. However, there are times when the temperature is elevated for no reason.

On the one hand, for some people this is the norm: there are people who always have it at 36, and there are those who have a normal temperature of 37.4 ° C. On the other hand, if a person usually has a normal temperature of 36.6 ° C, then a high temperature without symptoms in an adult means some kind of disorder.

Why does the temperature rise?

In all other situations, an increase in body temperature above normal indicates that the body is trying to fight something. In most cases, these are foreign agents in the body - bacteria, viruses, protozoa or a consequence of physical effects on the body (burn, frostbite, foreign body). At elevated temperatures, the existence of agents in the body becomes difficult, infections, for example, die at a temperature of about 38 C.

All fevers are divided into three groups:

Subfebrile fever, at which the temperature rises from 37 to 38 degrees;
Febrile fever- the temperature rises from 38 to 39 degrees;
hectic fever- temperature increase from up to 40 degrees and above.

But any organism, like a mechanism, is not perfect and can fail. In the case of temperature, we can observe this when the body, due to the individual characteristics of the immune system, reacts too violently to various infections, and the temperature rises too high, for most people it is 38.5 C.

Causes of high fever in adults without symptoms

An increase in temperature or fever is observed in almost all acute infectious diseases, as well as during the exacerbation of certain chronic diseases. And in the absence of catarrhal symptoms, doctors can determine the cause of the patient's high body temperature by isolating the pathogen either directly from the local focus of infection or from the blood.

It is much more difficult to determine the cause of the temperature without signs of a cold if the disease has arisen as a result of exposure to the body of opportunistic microbes (bacteria, fungi, mycoplasma) - against the background of a decrease in general or local immunity. Then it is necessary to conduct a detailed laboratory study of not only blood, but also urine, bile, sputum and mucus.

Causes of fever without symptoms can be associated with the following diseases:

In all situations, an increase in temperature without signs of a cold indicates that the body is trying to fight something. For example, the so-called subfebrile fever, often - a low level of hemoglobin in the blood.

Do I need to lower the temperature?

If its growth is observed, then it is worth bringing down the temperature using antipyretic drugs - Paracetamol, Aspirin ... you can also use - Ibuprofen, Nurofen. For children, children's Nurofen in the form of a sweet syrup is best suited, but Aspirin should not be given to a child.

At 42°C, irreversible changes occur in the cerebral cortex and a lethal outcome is possible. But this rarely happens.

Temperature 37 without symptoms: possible causes

Runny nose, fever, sore throat are all common symptoms of the common cold. But what to do if the temperature is 37 without symptoms? For what reasons this occurs and how to deal with it, let's figure it out.

Causes of fever without visible symptoms:

The onset of pregnancy (in women);
Weakened immunity;
The presence of any sluggish infection in the body;
Pre-cold state;
Depletion of human energy reserves;
General fatigue, depression or post-stress state;
Venereal diseases (, etc.)

Basically, a temperature of 37 without symptoms in an adult is due to the fact that there is some reason that caused such a condition, but it did not completely overcome the person's defenses.

Temperature 38 without symptoms: possible causes

A temperature of 38 without symptoms can occur quite often. And not always the reasons for this temperature are the same. This temperature may signal that it begins or (with catarrhal angina, the temperature rises slightly).

If the temperature is above 38 degrees without symptoms for 3 or more days, then this may be a manifestation of:

Rheumatism;
(this is characterized by severe stabbing pain in the lower back);
accompanied by jumps in blood pressure;

The most unpleasant syndrome is the persistence of elevated temperature for several weeks and even months. This is most likely:

A sign of the development of a tumor in the body;
Serious endocrine disorders;
Leukemia;
Diffuse changes in the liver or lungs.

The only thing that unites all these cases is that in any case, the temperature increase is due to the resistance of the body, which means that the immune system is fighting.

Temperature 39 without symptoms: possible causes

If a temperature of 39 without symptoms in an adult does not occur for the first time, then this is a clear sign of a pathological decrease in immunity and the development of a chronic inflammatory process. The phenomenon may be accompanied by loss of consciousness, febrile convulsions, shortness of breath or its further increase. In this case, you must definitely contact a medical institution.

A high body temperature of 39-39.5 ° without obvious symptoms can be a signal of the following diseases:

The presence of a tumor process;
Development ;
Manifestation of an allergic reaction;
chronic;
Manifestation of hypothalamic syndrome;
The presence of viral endocarditis;
The appearance of meningococcal infection.

Finding out the causes of an increase in temperature to 39 ° C in adults is a difficult task even for experienced specialists, since in order to establish the cause, it is necessary to isolate the pathogen from the blood or the focus of infection.

What to do?

Go see your therapist first. Very often, we are simply not able to notice certain symptoms, and the doctor can easily identify them and be able to diagnose the disease. It is also necessary to pass tests, they will help to identify many diseases that do not manifest themselves outwardly. Sometimes a doctor may order a sputum, urine, or blood culture, x-ray, or ultrasound.

If the temperature is very high, it is worth calling an ambulance team so that the doctors can provide emergency care and decide on hospitalization. In any case, high temperature is the body's "cry" for help, and you should pay attention to it.

Life "under the hood"

10 Reasons Your Temperature May Rise

1. The disease begins suddenly, usually with chills, there is an ache in the body, pain in the eyes. The temperature quickly rises to 38 - 39 degrees, its fluctuations are insignificant during the day. Can keep for 4-5 days.

It looks like the flu, especially since the season is right. Other SARS also occur with an increase in temperature, but more often not so high.

2. The temperature suddenly rises to 39 - 40 degrees, there is a severe headache, pain in the chest, aggravated by inhalation. On the face - a feverish blush, herpes can become more active on the lips. A day later, brownish sputum begins to depart.

This is how pneumonia works. It captures a segment or lobe of the lung (sometimes it is bilateral). True, now more and more often this disease occurs in a blurred form.

3. During the day, the temperature jumps to 38 - 39 degrees. A rash appears all over the body. Before that, for several days there may be weakness, runny nose. Adults get sick more severely than children.

It looks like you've caught measles, or rubella, or scarlet fever - these infectious diseases are very similar in the initial stages. Characteristic signs help to make the diagnosis correctly: with rubella, the lymph nodes increase, with scarlet fever, the rash is small, there is no runny nose, unlike measles, but often it is accompanied by a sore throat.

4. There is a periodic rise in temperature, more often subfebrile condition. White blood cells may be elevated in the blood.

It seems that there is a chronic disease, or there is a hidden focus of infection in the body.

Fever is often the main or even the only sign of inflammatory processes. For example, exacerbation of pyelonephritis, inflammation in the gallbladder, arthritic joints sometimes do not have obvious clinical manifestations, except for fever.

5. The temperature quickly jumps up to 40 degrees in a few hours. There is a severe headache, vomiting, which does not bring relief. The patient cannot tilt his head forward, straighten his legs. A rash appears. There may be strabismus, a nervous tic in the eye area.

It looks like infectious meningitis - inflammation of the lining of the brain. It is necessary to immediately call an ambulance and hospitalize the patient.

6. Prolonged (more than a month) causeless fever is combined with general malaise, weakness, loss of appetite and weight. Lymph nodes enlarge, blood appears in the urine, etc.

An increase in body temperature almost always occurs with tumors. It is especially characteristic of tumors of the kidneys, liver, lung cancer, leukemia. There is no need to panic right away, but in some cases, especially the elderly, it is necessary to be examined by an oncologist without wasting time.

7. Increased body temperature, often around 37 - 38 degrees, combined with weight loss, irritability, tearfulness, fatigue, a sense of fear. Appetite increases, but weight is lost.

You need to check your thyroid hormones. A similar picture occurs with diffuse toxic goiter.

In case of violation of the function of the thyroid gland - hyperthyroidism - a disorder of the body's thermoregulation occurs.

An increase in temperature is combined with damage to the joints, kidneys, pain in the heart.

Fever is almost always the case with rheumatism and rheumatism-like diseases. These are autoimmune diseases - with them the general immune status of the body is disturbed, and leapfrog begins, including with temperature.

Subfebrile temperature, mainly in young women, is combined with pressure drops, there may be redness of the face, neck, chest.

This is constitutional hyperthermia - more often it is observed in young people with nervous and physical overstrain, for example, during exams. Of course, this diagnosis can be made with the exclusion of other causes of temperature rise.

Even after a thorough examination, it is not possible to identify the cause of the fever. Nevertheless, an elevated temperature (38 and above) or its periodic rises within 3 weeks is fixed.

Doctors call such cases "fever of unknown origin." It is necessary to search more carefully, using special research methods: an immune status test, an endocrinological examination. Sometimes a rise in temperature can provoke the intake of certain antibiotics, analgesics - this is a drug fever.

BY THE WAY
The normal temperature of the human body - from 36 to 36.9 degrees - is regulated by a part of the brain called the hypothalamus.
Most often, an increase in temperature is a protective and adaptive factor of the body.

ON A NOTE
What will help bring down the temperature without medication:
Rubbing the body with a weak solution of table vinegar.
Warm green tea or black with raspberries.
Citrus. In order for the temperature during a cold to drop by 0.3 - 0.5 degrees, you need to eat 1 grapefruit, 2 oranges or half a lemon.
Cranberry juice.

FACT
It is believed that with colds, temperatures up to 38 degrees should not be knocked down with the help of medicines.

TYPES OF TEMPERATURE
37 - 38 degrees - subfebrile,
38 - 38.9 - moderate,
39 - 40 - high,
41 - 42 - extra high.

What are the causes of a constant or intermittent slight increase in temperature at certain times of the day, in the evening or during the day? Why is an increase in body temperature from 37.2 to 37.6 ° often observed in children, the elderly or pregnant women?

What does subfebrile temperature mean

Subfebrile is denoted slight increase in body temperature before 37.2-37.6°C, the value of which, as a rule, fluctuates in the range of 36.8 ± 0.4 °C. Sometimes temperatures can reach 38°C, but do not exceed this value, since temperatures over 38°C indicate fever.

Subfebrile temperature can affect any person, but children and the elderly the most vulnerable, as they are more susceptible to infections and their immune system is unable to protect the body.

When and how subfebrile temperature manifests itself

Subfebrile temperature may appear in various times of the day, which sometimes correlates with possible pathological or non-pathological causes.

Depending on the time at which subfebrile temperature occurs, we can distinguish:

morning: The subject suffers from subfebrile temperature in the morning when the temperature rises above 37.2°C. Although in the morning the physiologically normal body temperature should be below the average daily temperature, therefore even a slight increase can be defined as a subfebrile temperature.
After eating: after dinner, due to the processes of digestion and related physiological processes, the body temperature rises. This is not uncommon, therefore, a temperature increase of more than 37.5 ° C refers to subfebrile.
Afternoon/evening: during the day and in the evening there are also periods of physiological increase in body temperature. Therefore, subfebrile temperature includes an increase in excess of 37.5 ° C.

Subfebrile temperature can also be manifested different modes, which, as in the previous case, depends on the nature of the causes, for example:

sporadic: This type of subfebrile temperature is episodic, may be associated with seasonal changes or the onset of the menstrual cycle in women of childbearing age, or be the result of intense physical activity. This form causes the least concern, since, in most cases, it is not associated with pathology.
intermittent: such subfebrile temperature is characterized by fluctuations or periodic occurrences at certain points in time. May be associated, for example, with physiological events, periods of intense stress, or an indicator of disease progression.
Persistent: a constant subfebrile temperature that persists and does not decrease throughout the day and lasts for quite a long time is alarming, as it is closely associated with certain diseases.

Symptoms associated with subfebrile temperature

Subfebrile temperature can be completely asymptomatic or accompanied by a wide variety of symptoms, which, as a rule, become the reason for going to the doctor for diagnosis.

Among the symptoms that are most often associated with subfebrile temperature, there are:

Asthenia: The subject experiences a feeling of fatigue and exhaustion, which is directly correlated with an increase in temperature. This may be due to infections, malignancies and seasonal changes.
pain: Along with the appearance of subfebrile temperature, the subject may feel pain in the joints, pain in the back, or pain in the legs. In this case, a connection with the flu or a sharp seasonal change is possible.
Cold symptoms: if headache, dry cough and sore throat appear along with subfebrile temperature, then hypothermia and exposure to the virus may be taking place.
Abdominal symptoms: along with a slight increase in temperature, the patient may complain of abdominal pain, diarrhea, nausea. One of the possible reasons is infection with a gastroenterological infection.
Psychogenic symptoms: sometimes it is possible, along with the appearance of subfebrile temperature, the appearance of episodes of anxiety, tachycardia and sudden trembling. In this case, it is possible that the subject is suffering from problems of a depressive nature.
Enlarged lymph nodes: if subfebrile temperature is accompanied by an increase in lymph nodes and profuse sweating, especially at night, then it may be associated with a tumor or infection, for example, mononucleosis.

Causes of subfebrile temperature

When subfebrile temperature is sporadic or periodic, has a correlation with certain periods of years, months or days, then it is almost certainly associated with a non-pathological cause.

Temperature causes...

Prolonged and persistent low-grade fever, which persists for many days and appears mainly in the evening or during the day, is often associated with a specific disease.

Causes of subfebrile temperature, without pathology:

Digestion: after eating food, digestive processes cause a physiological increase in body temperature. This can cause a mild low-grade fever, especially if you have ingested hot food or drinks.
Heat: in summer, when the air reaches high temperatures, being in a room that is too hot can cause increase in body temperature. This happens especially often in children and newborns, whose body thermoregulation system is not yet fully developed.
Stress: in some individuals, especially sensitive to stressful events, subfebrile temperature can be interpreted as a reaction to stress. Usually, the temperature rise occurs in anticipation of stressful events or immediately after it has happened. This type of subfebrile temperature can appear even in infants, for example, when he cries very intensely for a long time.
Hormonal changes: In women, subfebrile temperature may be closely related to hormonal changes. So in the stage of premenstruation, body temperature increases by 0.5-0.6°C, and this can determine a slight increase in temperature in the range from 37 to 37.4°C. Also, in the early stages of pregnancy, hormonal changes lead to a similar increase in body temperature.
season change: as part of the change of season and a sharp transition from high to cold temperatures, and vice versa, a change in body temperature may occur (without causes of a pathological basis).
Medications: some medications have low-grade fever as a side effect. These include antibacterials of the beta-lactam antibiotic class, most anticancer drugs, and other drugs such as quinidine, phenytoin, and some vaccine components.

Pathological causes of subfebrile temperature

The most common pathological causes of subfebrile temperature are:

Neoplasms: tumors are the main cause of persistent low-grade fever, especially in the elderly. Among the tumors that most often lead to an increase in body temperature, there are leukemias, Hodgkin's lymphoma, and several other types of cancer. Usually, subfebrile temperature in the case of a tumor is accompanied by rapid weight loss, a strong feeling of fatigue, and in the case of tumors involving blood cells, anemia.
Viral infections: one of the viral infections that causes subfebrile temperature is HIV, which leads to the development of acquired immunodeficiency syndrome. This virus generally destroys the subject's immune system, therefore causing emaciation, which is manifested by a variety of symptoms, one of which is low-grade fever, opportunistic-type infections, asthenia, and weight loss. Another viral infection that causes persistent low grade fever is infectious mononucleosis, known as "kissing disease" due to its transmission of salivary secretions.
Respiratory tract infections: low-grade fever is often present in case of an infection involving the respiratory tract (such as pharyngitis, sinusitis, pneumonia, bronchitis or a cold). One of the most dangerous infections of the respiratory tract, which causes the appearance of subfebrile temperature, is tuberculosis, which is accompanied by profuse sweating, asthenia, weakness and weight loss.
Thyroid problems: subfebrile temperature is one of the symptoms of hyperthyroidism, caused by thyrotoxic destruction of the thyroid gland. This destruction of the thyroid gland is called thyroiditis and is often caused by a viral infection.
Other pathologies: There are other diseases, such as celiac disease or rheumatic fever caused by streptococcal infection, beta-hemolytic type, which include the appearance of subfebrile temperature. However, in these cases, subfebrile temperature is not the main symptom.

How is subfebrile temperature treated?

Subfebrile temperature is not a pathology, but a symptom by which the body can indicate that something is going wrong. In fact, there are many diseases that can lead to persistent low-grade fever.

However, often slight increase in body temperature has no pathological causes and can be compensated with the help of simple natural remedies.

It is difficult to find the cause of subfebrile temperature, but, in any case, you should consult a doctor.

Natural remedies against non-pathological low-grade fever

To combat the symptoms caused by low-grade fever, natural remedies such as herbal medicine can be used. Of course, before resorting to one of these remedies, you should consult your doctor.

Among medicinal plants, used in the case of subfebrile temperature, the most important are:

Gentian: used in case of intermittent low grade fever, this plant contains bitter glycosides and alkaloids, which gives it antipyretic properties.

Used as a decoction: 2 g of gentian roots are boiled in 100 ml of boiling water, left to infuse for about a quarter of an hour, and then filtered. It is recommended to drink two cups a day.

white willow: contains, among other active substances, derivatives of salicylic acid, which have the same antipyretic effect as aspirin.

A decoction can be prepared by bringing to a boil a liter of water containing about 25 grams of white willow root. Boil for about 10-15 minutes, then filter and drink two to three times a day.

Linden: useful as an associated antipyretic, linden contains tannins and mucus.

It is used in the form of infusions, which are prepared by adding a tablespoon of linden flowers to 250 ml of boiling water, followed by infusion for ten minutes and filtering, you can drink several times a day.