Sweating in infants and young children may be related to insufficiency of the thermoregulatory center, continuous sympathetic nerve excitation and calcium deficiency. 1. Inadequate function of the thermoregulatory center: The thermoregulatory center of infants and young children is not fully developed, and its function of regulating body temperature is not perfect. If the quilt is too thick when infants sleep at night, the body heat is not distributed, the thermoregulation center does not regulate the body temperature of infants in time, the body temperature is always high, which will lead to infants’ head sweating. 2. Continuous sympathetic excitation: If the infant is too excited before going to bed, it may lead to continuous sympathetic excitation, even after going to bed, the sympathetic nerves have not regained their calmness, which may lead to adequate blood supply to the head, the pores open, thus causing head sweating. 3. Calcium deficiency: Calcium deficiency will cause the cerebral cortex of infants and young children with elevated excitability, abnormal nerve activity, infants and young children will appear head sweating, night terrors, crying and other symptoms. If the infant sleep head sweat does not relieve, to take the infant to the hospital in time to seek medical treatment, by the professional doctor to find out the cause of the targeted treatment.