The main causes of calf muscle atrophy include trauma and surgical causes and neuronal lesions. 1. Trauma, surgery: patients with a clear history of trauma and surgery, due to the need for prolonged braking, such as prolonged cast external immobilization, do not go down to the ground to move, the calf muscle can not get active contraction or contraction strength is not enough to maintain the original muscle dimensions, which will lead to the calf area of the muscle to appear wasteful atrophy. 2. Neuronal lesions: mainly including central nerve injury and peripheral nerve injury. Damage to the central nervous system will cause the brain to be unable to send out the correct signals to cause muscle contraction. Such as cerebral hemorrhage, cerebral infarction, etc.; peripheral nerve injury is mainly seen in the nerve damage or compression, the muscles in the calf area lose innervation, muscle atrophy, such as lumbar intervertebral disc herniation, common peroneal nerve injury. Calf muscle atrophy may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.