Bone bulge on the shoulder may be caused by physiological reasons, or it may be caused by pathological reasons. Whether the bulge is a normal physiological phenomenon needs to be analyzed in conjunction with the patient’s symptoms, examination results, etc. and cannot be generalized. 1. Physiological reasons: the shoulder is mainly composed of the clavicle and scapula, and if you are thin, you will feel that the bones on the shoulder are more convex, which is a normal physiological phenomenon. 2. Pathological reasons: Diseases can also lead to shoulder bone convexity, such as synovitis, humeral head dislocation, bone tumors, shoulder joint dislocation and so on. Diseases need to be confirmed by medical examination, such as X-ray, CT, etc. Patients will have pain, abnormal activities, dysfunction and other abnormal symptoms. Bone convexity on the shoulder may also be caused by other reasons. If physiological reasons are ruled out, you should go to a regular hospital as soon as possible to seek medical treatment to clarify the cause of the disease and then target treatment.