The common reasons for the ringing inside the shoulder when moving are congenital shoulder instability and rotator cuff injury, as follows: First, congenital shoulder instability: due to congenital development causes the joint capsule to be loose, and when the joint is moving, the joint surface of the humeral head and the joint surface of the scapular glenoid will rub and hit, so there will be a ringing sound, and if it is not controlled for a long time, it will cause degeneration of the shoulder joint, resulting in shoulder pain and Restricted movement. Secondly, rotator cuff injury: If the rotator cuff is partially torn and the broken end of the rotator cuff is obviously buckled, the torn end of the rotator cuff will wear and hit the shoulder peak during shoulder joint activities, which can also produce shoulder joint ringing, accompanied by shoulder joint weakness and shoulder joint activity limitation. After early and aggressive diagnosis and treatment, the patient can obtain relief of clinical symptoms, and sometimes surgical treatment is required, and arthroscopic minimally invasive surgery is generally used clinically to resolve the disease.