Muscle atrophy after arm reimplantation can be treated with medication, physical therapy and rehabilitation exercise according to the cause, which may include nerve damage, prolonged inactivity and so on. 1. Nerve damage: If the muscle atrophy is caused by nerve damage, it is usually difficult to recover. Clinically, it is mainly to take nutritive drugs such as methylcobalamin, rat nerve growth factor, etc., together with local acupuncture and other treatment programs carried out by professionals to help alleviate the problem. 2. Prolonged inactivity: If muscle atrophy is caused by prolonged inactivity after reimplantation, rehabilitation exercises, including elbow extension, elbow flexion, lifting dumbbells, etc., as well as physiotherapy, such as massage, acupuncture, etc., are often recommended. Rehabilitation exercises are recommended to be performed under professional guidance to avoid injury. If there is muscle atrophy after reimplantation of the broken arm, you should consult a doctor in a timely manner, improve the examination to clarify the cause of the disease, and follow the doctor’s instructions to carry out targeted treatment, do not use your own medication, so as to avoid delays in the condition.