Shoulder joint pain may be caused by trauma, inflammation, degeneration of shoulder joint, etc. The details are as follows: 1. Trauma: Shoulder joint pain can be caused by muscle strain or shoulder joint injury, such as acromioclavicular joint dislocation, rotator cuff injury, etc. caused by physical exercise or traffic accidents. 2. Inflammation: Shoulder joint pain may be caused by inflammation, such as deltoid tendonitis, subacromial bursitis, etc., which will show the symptoms of activity limitation and limited pressure pain. 3. Degeneration of the shoulder joint: it is often manifested as chronic pain in the shoulder, activity limitation, fear of cold and other symptoms, it is recommended to move the joint more, which can relieve the pain. There may be other causes of shoulder joint pain. It is recommended that you should consult a doctor in time to clarify the cause of the disease and carry out treatment under the doctor’s guidance.