Baby head sweating is generally caused by physiological factors, such as wearing too much, higher temperatures, there is also the possibility of suffering from disease, common is vitamin D deficiency rickets, hyperhidrosis. 1. Physiological factors: baby head sweating is usually parents to the baby wearing too much clothing, or the weather is hotter, the baby sweating increased, thus appearing baby head sweating. 2. Vitamin D deficiency rickets: Vitamin D deficiency rickets is related to vitamin D deficiency, the causes include perinatal vitamin D insufficiency, insufficient sunlight, fast growth rate, etc., the child will appear sweating, easy to scare and other symptoms, which can cause the baby’s head sweating. 3. Hyperhidrosis: Hyperhidrosis is divided into localized hyperhidrosis and generalized hyperhidrosis, if the baby suffers from localized hyperhidrosis, such as the head and other places, will lead to localized sweating, the cause of which is mostly related to genetic factors. Baby head sweat, there may be 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.