Frequent foot shaking during sleep can be hung orthopedics, the following common situations: First, the lower limbs in the sleep process of cold leading to muscle spasmodic contraction, causing frequent foot shaking symptoms, pay attention to warmth that can ease the shaking phenomenon. Second, overworked lower limb muscles strain during the day, the spinal cord cone bundle regulating muscles are inhibited during sleep at night, the leg muscles can appear involuntary contraction, manifested as frequent foot shaking symptoms. Third, the human body into deep sleep after the brain cells still exist part of the activity, easy to produce dreams, in the dream world, such as the occurrence of risk, the human body will usually run, hide, and in reality, the performance of foot shaking symptoms.