Sweat glands are one of the important structures of human skin to regulate body temperature, and children’s self-regulation ability of hot and cold is relatively poor. Generally, it is normal for babies to sweat a lot 1 to 2 hours after going to sleep, and it usually eases 2 hours after sleeping. There are two main causes of excessive sweating in babies: physiological excessive sweating and pathological excessive sweating. Normal causes: such as the hot climate in summer and cause children to sweat a lot; infants and young children just fall asleep, head and neck sweating, sweating reduced after sleep; baby games, running and jumping after sweating a lot; winter clothes wear too much, too thick covers at night, plus the indoor temperature is too high, so that the baby overheating and sweating a lot. Some babies sweat only on the head and forehead, these are physiological sweating, parents do not need to worry too much. For physiological sweating generally do not need special treatment, can take appropriate measures to remove the triggers that tend to cause increased heat production, the chances of night sweats will be reduced, you can replace the lost water and salt through a reasonable daily diet. Unusual causes: babies sweat excessively due to certain diseases, such as infantile active rickets, pediatric active tuberculosis, taking antipyretic drugs and mental factors, etc. Some babies have endocrine diseases can also cause pathological sweating, which is manifested as a lot of sweating when quiet or at night once they fall asleep, in addition to excessive sweating, there are corresponding disease manifestations, parents need to take their babies to the hospital for further relevant Parents need to take their baby to the hospital for further examination and treatment for the cause. Whether it is physiological or pathological sweating, care is very important. After the baby sweats, dry the skin and change clothes in time to avoid getting cold and flu, and pay attention to timely replenishment of water and salt. In addition, physical exercise should be carried out to improve the adaptability of children who are prone to sweating.