8-year-old children sleep sweaty head consider the following reasons: 1, the child’s metabolism, sweat gland secretion controlled by the vegetative nerve, the vegetative nerve excitation in the child asleep, resulting in sweating more to the head obviously, most of the fall asleep 1-2 hours will be relieved, this is a normal physiological phenomenon. 2, the child sleeps sweaty head, should pay attention to the problem of calcium deficiency, you can go to the hospital to find out whether the lack of trace elements caused by the lack of vitamin D. 3, should pay attention to the external temperature, should also be more sunshine or take gluconate calcium oral liquid, eat foods containing high calcium, such as milk, beans. Micronutrient deficiency caused by the lack of vitamin D can be supplemented, but also more sun or take calcium gluconate oral solution, eat calcium-containing foods, such as milk, soybean products. 3, should pay attention to changes in the external temperature, in the temperature is too high at night when the quilt cover more, may cause the child to sweat. 4, the child’s physical weakness, but also often occurs when the head sweats while sleeping phenomenon, to supplement the nutritional strengthen the Physical exercise.