Sweating in children may be caused by environmental factors, physiological phenomena and calcium deficiency. 1. Environmental factors: due to sleeping in the indoor temperature is too high, cover the bedding is too thick, or wear too much clothing and other factors, resulting in children’s body heat can not be emitted, caused by the phenomenon of sleep sweating. 2. Physiological phenomenon: due to the child’s autonomic nerve is not mature, sweating ability is not perfect, and the sympathetic nerve is easily excited caused by the phenomenon of sweating. Children’s rapid growth and development, metabolism is vigorous, produce more heat, will cause the phenomenon of excessive sweating in bed. 3. Calcium deficiency: due to the child’s rapid growth and development, need a lot of calcium to maintain the body’s growth and development needs, if you do not supplement calcium in a timely manner, there will be the performance of the child sleep sweating, but also accompanied by not easy to fall asleep, fall asleep after sleeping, sleep is not solid and other symptoms. There may also be other reasons for children to sweat a lot during sleep, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.