Baby fever: is it serious? Know what it can be and how to care

One of the most worrying situations is to notice an increase in the babies’ temperature. The fever is seen as a serious alarm and, when it happens to the little ones, the parents will have to seek medical care.

It is, in fact, an alarm. But it is not necessarily a bad thing, as it is a sign that the body is fighting some foreign organism, a natural response to increased immune work in the body.

That is, fever is not the problem itself, but a symptom.

So it is important to understand some things about fever, especially in babies, to know what to do in each case.

Babies can develop a fever for many different reasons. If the child is less than 3 months old, he should be taken to the hospital when he has a fever.

In this text, we will talk a little about fever in babies, its most common causes and what can be that fever that comes and goes all the time.


How many degrees is considered fever in a baby?

With measurement in the armpit, a temperature of 37.8ºC means that the baby has a fever. Above 37ºC, a feverish state can be considered, which should keep fathers and mothers alert – but it does not indicate the need for medication.

The recommendation for children under 3 months of age is to take them to the doctor if they have a temperature of 38ºC or more, especially if they show incessant crying and very high irritability.

When children have a fever, some signs may indicate an elevated temperature. The face is red, the forehead is hot and the hands are cold. If, in addition to high fever, they are showing other symptoms such as chills or tremors, it is recommended to medicate them with anti-thermal remedies, indicated by the pediatrician.

It is important to remember that, in the first year of life, babies’ bodies tend to vary in temperature more easily. This is mainly because the thermoregulator in the brain of the little ones is not yet fully formed.

Thus, if the baby is left with many clothes or covers for a long period of time, it is normal for his body temperature to rise as well.

If there is any doubt as to whether there is a fever or not, it is important to take the measurement after a bath. The most common ways to measure the temperature of babies is through the armpit or the rectum. In the case of rectal measurement, the temperature is approximately 1ºC higher than that of the armpit.

High fever in babies: what can it be?

Since fever is an organism’s response to an abnormality, it can be a symptom of different conditions. There are some reasons that usually cause fever in babies, such as:

Reaction to vaccines

Fever is a common symptom after applying some vaccines to babies. It usually appears a few hours after vaccination, thus making it easy to identify the origin of the elevated temperature.

This is a natural reaction of the body and should not raise many concerns, unless the fever is very high or lasts for a long time. Doctors, already aware of this reaction, usually prescribe some antipyretic or analgesic to relieve the discomfort of the little ones after vaccination.

Tooth growth

The growth of teeth usually causes discomfort and irritation in babies. The irruption process, that is, the appearance of the teeth, can generate a mild fever in them. However, it is important to note that this increase in temperature does not normally exceed 38.2ºC.

If it is higher than that, it is important to check the cause with to avoid further complications. It is also possible that the appearance of a tooth ends up generating an inflammation, which can even lead to an infection.

Flu or severe cold

The flu or cold strong are one of the main reasons fever in babies. These diseases are caused by viruses and end up generating fever because the children’s immune system is still developing.

Usually, the flu and the cold spontaneously improve, and the fever should not last more than 3 days. If this time is longer, it is essential to consult a doctor, as there may be an infection being developed.

Bacterial infections

Although most infections in babies are caused by viruses, bacterial infections can also occur. The most common are ear, throat and urinary tract infections.

They usually cause a fever too. Therefore, it is important to consult the pediatrician if the symptoms last for more than two days. Once the source of the infection has been identified, the use of antibiotics for treatment can be prescribed .

What to do when the baby has a fever?

If you have a mild or moderate fever in your baby, there are a few things you can do to lower your temperature. First, remove excess clothing, which retains heat. In addition, giving the child a warm bath helps to alleviate the symptom.

However, never put your child in cold water. The thermal shock will cause the body to try to produce even more heat, causing chills.

Compresses are also a good option. A wet cloth on the baby’s forehead helps to lower the baby’s temperature.

In addition, it is important to give the child some liquid, preferably water. When she has a fever, she sweats more than normal. Therefore, keeping it hydrated is essential.

Just like hydration, rest is essential to reduce fever. If the child is agitated, the temperature tends to increase, because the metabolism is accelerated.

Doctors usually recommend that if the temperature goes over 37.8ºC and the child is showing signs of irritation, discomfort and pain, he should be medicated with an anti-thermal.

If the symptoms last more than 48 hours, it is essential to take the baby to the pediatrician, so that the proper diagnosis is made and, if necessary, tests to find out the cause of the fever.

Read more: Feverish temperature: understand what can be

Fever in a baby that comes and goes

Babies can have chronic fever, which can be a sign of a serious infectious disease, such as hepatitis, pneumonia and tuberculosis .

If the temperature decreases but rises again, and remains on that cycle, it is essential to consult a doctor. Serious illnesses like pneumonia and tuberculosis are more easily cured when first diagnosed.

Remembering that the child should never be medicated without medical advice, as there may be health risks.