Shoulder joint pain may be caused by frozen shoulder, shoulder joint strain, or shoulder trauma, and it is necessary to consult a doctor in time to find out the cause. 1. Frozen shoulder: Aseptic inflammation of shoulder due to degeneration and poor posture of the tissues around the shoulder joint, patients may suffer from pain around the shoulder joint and restriction of activities. 2. Shoulder joint strain: long-term over-activity of the shoulder can cause shoulder joint strain and shoulder joint pain. 3. Shoulder trauma: If the shoulder suffers from collision and other external injuries, it will also lead to shoulder joint pain, activity or perhaps, joint stiffness and other symptoms. There may be other reasons for shoulder joint pain, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.