Consider frozen shoulder, rotator cuff injury, muscle strain, cervical spondylosis, osteoarthritis, acromioclavicular impingement syndrome and other causes of right shoulder pain. 1. Frozen shoulder: adhesion of muscles, fascia and ligaments around the shoulder joint, resulting in shoulder joint pain and restricted movement. It is the more common cause of right hand shoulder pain. 2. Rotator cuff injury: the cartilage and ligament of the shoulder joint are damaged due to trauma, resulting in shoulder joint pain and limited active activities, such as weakness in abduction and lifting. 3. Cervical spondylosis: pain in the neck and shoulder can occur and radiate to the upper limbs, some may have numbness in the upper limbs and weakness in grasping. 4. Osteoarthritis: Shoulder pain can occur due to osteophytes in the shoulder joint, wear and tear of the articular cartilage, and narrowing of the joint space. 5. Acromioclavicular Impingement Syndrome (AIS): Shoulder pain when lifting the arm is caused by hyperplasia of the greater tuberosity of the humerus or abnormal development of the acromion. If the pain in the right shoulder is not alleviated by rest, go to the hospital for examination in time.