Many babies are sweating when they sleep, and there are two kinds of sweating in general, which can be divided into physiological sweating and pathological sweating. Physiological sweating, physiological sweating after the baby falls asleep is a normal situation, because the baby’s metabolism is faster, the sweat glands are well-developed and active, the baby just fell asleep because the vagus nerve is still in a state of excitement and lead to sweating, this situation is mainly based on the baby’s head and face sweating, one to two hours after falling asleep this situation will disappear. As your baby grows up, this physiological sweating symptom will disappear. Pathological sweating, the baby has been sleeping for some time, in a quiet state also easy to sweat, but also accompanied by hair thinning, occipital baldness, may be due to the baby lack of vitamin D and other factors, need to give the baby timely vitamin D supplementation. If the baby is sweating all night, and the daily face flushed, poor appetite for food, may be tuberculosis, need timely treatment. Also a disease of the baby’s thermoregulatory nerves can lead to profuse sweating. It is very common for babies to sweat in their sleep. Parents should be able to distinguish whether it is pathological or physiological, if it is physiological sweating there is no need to worry, but if it is found to be pathological it should be promptly checked and treated at the hospital.