Causes of sweaty hands and feet in children include high metabolism, calcium or vitamin D deficiency, and infections. 1. Exuberant metabolism: children’s metabolism is relatively vigorous, and because of the immaturity of their body temperature centers, sweaty hands and feet may occur when the temperature of the external environment is high or when they exercise a little. 2. Calcium or vitamin D deficiency: children’s growth and development process can easily lead to calcium or vitamin D deficiency, which may lead to sympathetic nerve excitation, resulting in sweaty hands and feet, and may be accompanied by funnel chest, rickets and other symptoms. 3. Infection: small children who are weak, it is easy to have upper respiratory tract infections or gastrointestinal infections, resulting in fever, sweaty hands and feet symptoms. Children’s sweaty hands and feet may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.