Sweating of the head at night can be caused by physiological and pathological factors, including malnutrition, tuberculosis and other pathological factors. 1. Physiological factors: the metabolism of young children is more vigorous, and the sweat glands of the head are more developed, the central nervous system is not yet fully developed and easy to be excited, which leads to easy sweating during sleep. Secondly, the external environment temperature is too high, the quilt is too thick, resulting in the body heat can not be emitted, which will cause the phenomenon of sweating. 2. Pathological factors: the lack of vitamin D and calcium caused by malnutrition in young children will lead to increased nerve excitability and abnormal metabolic rate, thus leading to excessive sweating. When a child is infected with tuberculosis, the toxins secreted by the germs will stimulate the central nervous system and lead to dysfunction, thus showing the symptom of sweating during sleep. There may be other causes of night sweating in young children, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.