There are physiological factors and pathological factors in the child’s sleeping leg movement, and the pathological causes include rickets, epilepsy, meningitis and so on. 1. Physiological factors: the child is in the period of physical development, the central nervous system is not yet mature, and the excitability of the cerebral cortex is high. Therefore, when the child is stimulated during sleep, such as noise, temperature changes can occur when the body shaking. Excessive exercise during the day can also lead to body shaking during sleep. 2. Pathological factors: rickets is often caused by vitamin D deficiency and calcium deficiency, which often causes increased neuromuscular excitability, resulting in body shaking during sleep. Epileptic children due to abnormal neuronal discharges, which can lead to the child’s body shaking during sleep. Meningitis can lead to body infections which can cause symptoms such as chills, and can also trigger convulsions, which are mainly characterized by body shaking. There may be other reasons why your child’s legs move when he sleeps, so it is recommended that you go to the hospital in time for a complete examination to determine the cause of the problem, and then give targeted treatment or therapy under the guidance of the doctor.