Excessive sweating in children includes both physiological and pathological factors, usually most cases of excessive sweating are physiological and only a few cases are pathological. Physiological causes are seen in children who sweat excessively due to high ambient temperatures, thick clothing, and excessive activity, all of which are physiological and can be avoided with changes in these external causes. Pathological hyperhidrosis refers to sweating caused by a known or potential disease in children, which is manifested by excessive sweating under quiet and sleep conditions, and can be seen in the following causes: i. Nutritional deficiency and metabolic diseases, such as active rickets, malnutrition, etc. Second, infectious diseases. iii. rheumatic and immunological diseases. IV. Neuropsychiatric and endocrine disorders. V. Drugs and poisoning. Therefore, when children sweat a lot, we must first exclude physiological causes and then clarify other causes.