There are many reasons for right shoulder pain, such as trauma, cervical spondylosis, frozen shoulder, visceral diseases and so on. 1. Trauma: muscle and soft tissue injuries around the right shoulder joint can cause right shoulder pain, mostly due to trauma, prolonged exercise, sprains and other factors. 2. Cervical spondylosis: Cervical spondylosis compresses the nerve root, which can cause shoulder pain, arm numbness, restricted movement and other phenomena, thus leading to the phenomenon of right shoulder pain. 3. Frozen shoulder: Frozen shoulder may be related to degenerative changes, long-term posture, and cold shoulder, which may also cause right shoulder pain and limited movement. 4. Internal diseases: Liver lesions, pleural lesions, etc. may cause radiating pain, which may lead to the phenomenon of radiating pain in the right shoulder. The causes of right shoulder pain are very many, and should not be ignored, it is recommended that the patient go to the hospital in time to improve the examination, clear diagnosis, and then follow the doctor’s instructions to take standardized treatment.