Fever in children may be caused by internal heat, infection and other diseases. It is recommended to go to the hospital in time to determine the cause and treat the cause.1. Internal heat: If the child has indigestion, it can lead to food gathering in the gastrointestinal tract, depressing and turning into heat, leading to fever. At this time, the child’s body temperature is not high, only feel hot, measure the body temperature within the normal range. Under the guidance of the doctor, you can take drugs that promote gastric power and digestion orally, and eat less food that can easily cause abdominal distension and indigestion, such as glutinous rice, chestnuts and sweet potatoes. Eat regularly, take three meals a day at regular intervals and avoid overeating. After the indigestion symptoms are controlled, the fever symptoms can be relieved; 2. Infection: various bacterial and viral infections can lead to fever in the body of the child. The pathogenic bacteria make the child’s body endogenous pyrogen, resulting in the central nervous system temperature adjustment point upward, and then cause fever, then to give cooling, such as warm water wipe, while actively anti-infection treatment; 3, other diseases: such as leukemia, lymphoma, neurological tumors, in addition to fever often have liver, spleen and lymph node enlargement, accompanied by wasting. Parents need to pay attention to this and seek medical attention as soon as possible.