Excessive head sweating in children may be caused by excessive exercise, environmental factors, and vitamin D deficiency. 1. Excessive exercise: Children are more active in their daily activities, and their metabolism speeds up after a long period of exercise, which can lead to increased sweating on the head. 2. Environmental factors: If the child is currently in the environment of higher temperatures, and more clothing, long-term stay in the environment, it is possible to trigger head sweating, which is a normal physiological phenomenon. 3. Lack of vitamin D: lack of vitamin D in children may lead to calcium and phosphorus disorders, causing vitamin D deficiency rickets. Children may show excessive sweating, occipital baldness, irritability, night terrors and so on. Children’s head sweating may also be seen in other causes, parents can take their children to the regular medical institutions for examination, clear diagnosis and follow the doctor’s instructions for treatment.