The causes of right shoulder pain include the following: first, cervical spondylosis, when the cervical spondylosis is neurogenic cervical spondylosis or cervical cervical spondylosis, there will be symptoms of shoulder pain, then we have to carry out X-ray and MRI of the cervical spine for early diagnosis and treatment; second, shoulder diseases, when the shoulder joint has frozen shoulder or early rotator cuff injury, there can be shoulder pain, then we have to carry out Third, myofasciitis. Myofasciitis often starts with pain in the medial scapula of the shoulder joint, which can radiate to the ipsilateral shoulder and upper limb, with symptoms of numbness and weakness.