Sweating children may be physiological phenomenon, but may also be rickets, hyperthyroidism and other diseases. 1. Physiological phenomenon: for children, due to their own metabolism, skin water content is larger, and the body’s ability to self-regulation of heat and cold is poor, so it will be more sweaty, is a normal physiological phenomenon. 2. Rickets: The basic cause of this disease is related to insufficient intake of vitamin D or lack of sun exposure, resulting in abnormal calcium and phosphorus metabolism in the body. Generally in the early stage of the disease when there is no typical performance, with the development of the disease, the child will appear sweating, irritability, restlessness at night, crying, irritability and other symptoms, so sweaty children may be suffering from rickets. 3. Hyperthyroidism: This disease is mainly caused by overactive thyroid function, resulting in increased secretion of thyroid hormones, and is considered to be related to excessive iodine intake, genetics and other reasons. Common symptoms include irritability, excessive sweating, fear of heat, hyperphagia, etc., which can be manifested as sweating in children. If sweating is ruled out as a physiological phenomenon, the child needs to go to the hospital in a timely manner to clarify the specific cause.