Sweaty hands and feet in children may be caused by psychological tension, overdressing and calcium deficiency. 1. Psychological tension: When a child is extremely nervous, the sympathetic nerves are in a state of excitement, and the phenomenon of sweaty hands and feet may occur, and the child needs psychological guidance. 2. Overdressing: when children wear too many clothes, too thick, or the outside temperature is too high, the human body has a thermoregulatory mechanism, in order to dissipate the heat will be sweaty hands and feet, this time you need to appropriate cut some clothes. 3. Calcium deficiency: If a child is deficient in calcium, the sympathetic nerves will also be excited, leading to the phenomenon of sweaty hands and feet. This situation is usually accompanied by sleep disturbance, pillow baldness, crying at night and other symptoms, this time you need to supplement calcium. If a child’s hands and feet sweat, you need to pay attention to the cause of sweating, if it is caused by a lack of calcium sweating, you need to go to the hospital for further examination, under the guidance of the doctor to supplement calcium treatment.