Shoulder joint ringing can be attributed to the following causes: 1. Synovial hyperplasia of the shoulder joint: excessive hyperplasia of the synovial membrane can occur when the cartilage of the shoulder joint is swept, which often does not cause pain and does not require special treatment; 2. Degenerative osteoarthritis of the shoulder joint: due to the gradual degeneration of the articular cartilage of the shoulder joint glenoid and humeral head, the friction within the joint increases, and when the joint is moved, there is often friction between the bones. A popping, bone rubbing sound can occur. Patients can have intra-articular injections of sodium vitrate to lubricate the joint and reduce friction.