When muscle atrophy occurs after surgery, it is important to determine whether the muscle atrophy is due to surgical injury or nerve damage caused by compression of the nerve, resulting in muscle atrophy due to immobility. In addition, disuse atrophy occurs after orthopedic extremity surgery due to early inability to move. If the muscle atrophy is caused by nerve damage, it is necessary to treat the nerves mainly, and you can apply nerve-nourishing drugs such as methylcobalamin, vitamin B complex tablets or rat nerve growth factor injection to promote the recovery of nerve function, and then slowly exercise after the recovery of nerve function, the muscle atrophy can return to normal. In case of disuse atrophy due to inactivity after fracture surgery, we must wait for the fracture to heal completely before strengthening the functional exercise of the limb, and the muscle atrophy can gradually recover.