Clinically, pain in the shoulder is mainly caused by myofasciitis, frozen shoulder, trauma and excessive pressure. 1. Myofasciitis: it is mostly caused by strain or cold, the pain is mostly aching and hidden discomfort, the local pain is obvious when pressed, and the pain can be relieved after appropriate activities and physical therapy. 2. Frozen shoulder: it usually occurs at the age of about fifty, accompanied by limited movement of the shoulder joint and obvious pain at night. 3. Trauma: such as local soft tissue injury and rotator cuff injury, etc., with a history of trauma. 4. Physiological factors: such as excessive pressure on the shoulder leading to poor local blood circulation, resulting in aseptic inflammatory reaction causing pain. If the pain in the shoulder where the bone protrudes is frequent and does not get better after resting, it is necessary to go to the hospital in time to get a clear diagnosis.