What causes children to have frequent low-grade fever?

Children's bodies are very fragile, so their physical condition has always been the focus of parents' concern. Around us, we often see many children who are often sick, and their family members take them to the hospital in a hurry, which makes people very anxious. Winter is coming, this is the season when diseases are prevalent, and it is also a time when hospitals are very tense. Although fever is not a serious illness, it is very uncomfortable for children. So do you know why children often have a low fever?

The body's hypothalamus has a body temperature regulation center, which functions like the temperature setting of an air conditioner. Under normal circumstances, the temperature set for infants and young children is slightly higher than that for adults. The rectal temperature of infants and young children is about 37.5℃, with a fluctuation of about 1℃. The oral temperature of adults and older children is approximately 36.8℃, with a fluctuation of 0.5℃.

If the set temperature is raised, for example, if the human body is infected with pathogens, causing the white blood cells to react and produce "thermophores", it will stimulate the temperature regulation center of the hypothalamus. When the set temperature is adjusted to 39°C, the body produces heat through muscle trembling and contraction, or reduces sweating to dissipate heat, raising the body temperature to 39°C. So before a fever occurs, you may feel chills and shiver, and then suddenly have a high fever, producing certain bacterial toxins. This phenomenon is particularly obvious.

1. Non-disease factors:

The baby's body temperature is easily affected by the external environment: high temperature (heatstroke), wearing too many clothes, insufficient water intake, water loss (sweating, diarrhea), poor ventilation in the room, before and after strenuous exercise, the effects of certain special drugs, and other factors such as preventive injections may also cause fever. If the body temperature becomes unstable, the possibility of illness should be considered.

2. Disease factors:

(1) Fever in infants under 3 months old

Bacterial infection is the most common (such as group B streptococcus); other infections such as respiratory tract, urinary tract, gastrointestinal tract or otitis media can also cause fever. The most serious infectious disease is sepsis. Therefore, when a newborn has a fever, it is important to take the baby to a doctor for examination so that early diagnosis and treatment can be given.

(2) Fever in infants and young children older than 3 months

The most common ones are colds, otitis media, and urinary tract infections. Otitis media is usually caused by bacteria or viruses from a cold infecting the middle ear through the Eustachian tube. Except for severe otitis media where pus can be seen flowing into the ear, most abnormalities cannot be seen from the outside.

What is the reason why children often have low-grade fever? After reading the introduction above, I believe everyone has an understanding of the condition of children's fever. That is, when a child has a low-grade fever, it can be roughly divided into two situations. One is disease factors, and the other is non-disease factors. Therefore, in the face of such a situation, everyone must be cautious and pay attention. If it lasts too long, send to the hospital for treatment in time.