Sweating in children may be caused by physiological reasons, or it may be caused by lack of nutritional elements or hyperthyroidism. 1. Physiological sweating: It can be caused by hot weather, wearing too many clothes, high indoor temperature, or mental tension or fear. 2. Lack of nutritional elements: abnormal calcium metabolism in the body due to unbalanced diet, etc., causing calcium and vitamin D deficiency in children, which can lead to total sweating. 3. Hyperthyroidism: Hyperthyroidism causes the body’s metabolic rate to increase, which makes the nerves overexcited, and the child will appear to be afraid of heat and always sweating. There are many reasons why children always sweat, parents should take their children to the hospital in a timely manner according to the situation, to clarify the causes and then give targeted treatment.