If the baby is less than 3 months old, it needs to go to the hospital immediately. Infants over 3 months old are considered to have a low fever at 38.3℃. First of all, the child should be put to bed, the indoor environment should be kept quiet, the temperature should be moderate, the ventilation should be good, and the clothes and blankets should not be too thick. If the child is sweating a lot, change clean clothes and wipe the body with warm water in time. Generally speaking, when the body temperature rises to 38.5℃, medication can be taken to lower the body temperature. It is recommended that when taking antipyretic medication to take special medication for children, in taking is strictly according to the dosage provided by the doctor to prevent the medication from side effects on the child. The baby should pay attention to drink more water, when the fever is accelerated breathing, evaporate more water, so it is necessary to replenish water in time, drink more water, can also promote more urination, through urination can also achieve the purpose of cooling and toxin excretion. In terms of diet, we should also pay attention to the baby’s fever to speed up the metabolism, the consumption of nutrients greatly increased, the consumption of water in the body also increased significantly. At the same time in the fever, the secretion of digestive juices decreases, gastrointestinal peristalsis slows down, so the digestive function is significantly weakened, in the diet to pay attention to, light and easy to digest diet.