There are many reasons why children sweat a lot while sleeping, including physiological and pathological aspects, such as high ambient temperature, thick bedding and other physiological factors, as well as lack of vitamin D, tuberculosis and other pathological factors. 1. Physiological factors: children’s metabolism is relatively fast, coupled with the body’s water content is more, and its neural regulatory center is not perfect, easy to sweat when sleeping, belongs to the more normal physiological phenomenon; second is the influence of the environmental factors, if the indoor temperature is high, the cover is thicker, but also lead to the child sleep sweating more. 2. Pathologic factors: (1) lack of vitamin D or calcium: if the child’s body lacks vitamin D or calcium, it can lead to the emergence of rickets, and the child’s brain nervous system excitability increases, which leads to sleep sweating, insubstantial, crying and other phenomena; (2) Tuberculosis: if the child suffers from tuberculosis disease, especially tuberculosis, which is a chronic wasting disease, it can also lead to more sweating when the child sleeps at night. When the child sleep sweats a lot, pay attention to timely hospitalization, identify the cause of the disease and then carry out reasonable treatment.