After a naughty baby falls asleep, large beads of sweat often ooze from the forehead and nose, and the back of the chest is also sweaty. The baby is in good spirits during the day, can eat and play, does not look sick at all, and the weather is not too hot, how can he sweat so much? What is going on here? The physiological characteristics of infants and young children are the main reasons why they sweat a lot at night, as their sweat glands and nervous system are not well developed, and their metabolism is vigorous, and their skin has a lot of microvascular distribution and water content. The active children, who exercise a lot during the day, generate a lot of heat, and the body fails to distribute the excess heat, and the body temperature can reach about 38 degrees Celsius at night. After going to sleep, the excess heat is dissipated through sweating to maintain a normal body temperature. If the weather is hot and muggy and the bedroom is poorly ventilated, the child is more likely to sweat. This kind of sweating is called “physiological sweating” and usually occurs in the first half of the night and gradually subsides after a deep sleep. For physiological sweating, there is no need to worry too much. You should pay attention to reduce the amount of activity during the day, especially before bedtime, do not give them a lot of hot food and hot drinks, bedding increase or decrease according to the season, not to cover the child too thick blanket. A few children sweat at night due to diseases, the more common of which is rickets. To determine if a child’s night sweats are due to a disease, you can watch for symptoms such as sleep disturbance, irritability, and jumping. If so, parents should take the child to a doctor to confirm the diagnosis. For normal children, even if they sweat excessively, parents should not be nervous. They can use a dry towel to dry the sweat in time and change their underwear frequently to prevent them from catching a cold due to excessive sweating. The child should be bathed regularly, and the bedding or sleeping bag should be kept dry and disinfected. For children suspected of pathological sweating, they should go to the hospital in time for examination and take appropriate treatment measures. As the disease improves, the night sweats will naturally disappear.