Consider acromioclavicular arthritis, supraspinatus injury, frozen shoulder, cervical spondylosis and so on. 1. Acromioclavicular arthritis: degeneration and hyperplasia of acromioclavicular joint stimulate the surrounding tissues and cause pain, and X-ray film can be used to make a clear diagnosis. 2. Supraspinatus tendon injury: the supraspinatus tendon of rotator cuff muscle group is injured due to trauma, and the pain is obvious and the lifting activity of shoulder joint is limited. 3. Frozen shoulder: adhesion of tendons, ligaments and joint capsule around the shoulder joint, resulting in shoulder pain and limitation of shoulder joint activities, which can be recovered through rehabilitation exercises. 4. Cervical spondylosis: Osteomalacia or herniated nucleus pulposus compressing the nerves can cause pain in the shoulder joint, and it can also radiate to pain and numbness in the upper limbs. If the pain in a line of the shoulder peak does not get better through rest, you need to consult a doctor in time and have it examined and treated under the guidance of a doctor.