Children’s hands and feet move constantly in their sleep may be due to nightmares, rickets and epileptic seizures and so on. 1. Nightmares: If a child has a nightmare while sleeping, subconsciously panic and struggle, there will also be hands and feet move constantly. 2. Rickets: rickets is mainly caused by the lack of vitamin D and calcium ions in the body, which will make the child’s cerebral cortex excitability is relatively high, the child will fall asleep after the limbs twitching, head sweating and other symptoms. 3. Seizures: when a child sleeping suddenly by the cold, loud noise and other external stimuli and lead to epileptic seizures, the brain neurons abnormal discharge, will cause children muscle spasms, twitching limbs. There may be other reasons why a child’s arms and legs do not stop moving in his sleep, so it is recommended to go to the hospital in time to improve the examination and clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.