Sweating in children can be seen in physiological phenomena, pathological conditions (such as vitamin D deficiency, febrile diseases, etc.), the specific causes need to be analyzed according to its specific performance. 1. Physiological phenomenon: such as children in the activities, after exercise, or in the environment temperature is too high, wearing more, etc. can appear sweating phenomenon, there is often no other abnormalities (such as fever, etc.), is a normal physiological phenomenon. Part of the baby’s growth and development process, sweat glands developed, metabolism may also appear the above phenomenon. 2. Pathology (1) Nutritional vitamin D deficiency rickets: in the early stage of the disease, mostly seen in younger children, there may be increased neural excitability, sweating phenomenon, may be accompanied by irritability, irritability, and some of them may have cranial changes. (2) Febrile diseases: such as acute upper respiratory tract infections, mostly caused by viral infections (such as respiratory syncytial virus, etc.), and some of them may be secondary to bacterial infections, resulting in fever, and babies may develop the above phenomena during the course of the disease. (3) Tuberculosis: these children often have a history of exposure to tuberculosis, and may have night sweats, which are more pronounced at night, accompanied by low-grade fever and other symptoms, and a perfect tuberculin test and chest X-ray may assist in the diagnosis. It is recommended to consult a specialist if necessary to assess and determine the cause.