The common causes of humerus fracture are delayed healing of fracture, insufficient functional exercise, broken internal fixation, etc. The treatment includes local braking, proper functional exercise, and surgery. Treatment includes local braking, appropriate functional exercise, surgical treatment, etc. The appropriate treatment should be chosen according to the specific cause. 1. Delayed healing of fracture: the pain of humerus fracture after surgery may be caused by inappropriate activities, which leads to delayed healing of the fracture, at this time, the patient should be localized braking, wearing a brace, reducing arm activities. 2. Insufficient functional exercise: post-fracture pain may also be due to the lack of appropriate postoperative functional exercise, resulting in joint adhesion, resulting in pain when lifting the arm, should be appropriate joint functional exercises to prevent joint adhesion. 3. Fracture of internal fixation: due to fracture of internal fixation, the fractured internal fixation remains in the local area, resulting in pain, at this time, it is necessary to carry out another surgical treatment to take out the fractured internal fixation and re-fixation. The arm of the humerus fracture are 80 days to lift the arm when the pain may also have other reasons, such as infection, etc., it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.