In general, excessive night sweating in children may be caused by environmental factors, calcium deficiency, tuberculosis and other reasons. 1. Environmental factors: excessive sweating at night may be caused by high indoor temperatures or thick blankets, which is a physiological phenomenon and generally does not require special treatment. 2. Calcium deficiency: it can lead to abnormal metabolic rate of the body, which leads to excessive sweating at night, usually accompanied by nocturnal crying, sleep disturbance, occipital baldness and so on. 3. Tuberculosis: It is a respiratory infectious disease that occurs in the lung tissue, trachea, bronchus and pleura caused by Mycobacterium tuberculosis infection. Tuberculosis is a consumptive disease, which can also be seen in the phenomenon of excessive night sweating. In addition, children’s night sweating can also be seen in other diseases, it is recommended that patients exclude physiological reasons to go to the hospital in a timely manner to avoid delaying the condition.