Shoulder pain when lifting the arm may be caused by physiological reasons such as fatigue, or it may be caused by trauma, frozen shoulder, cervical spondylosis, other diseases of the shoulder joint and other pathological reasons. 1. Physiological reasons: common in long-term weight lifting people, long-term exercise or exertion caused by the accumulation of lactic acid in the muscles of the upper limbs, can appear when the arm is lifted to shoulder pain, generally after resting can be relieved. 2. Trauma: due to trauma resulting in shoulder fracture, soft tissue injury such as rotator cuff injury, shoulder dislocation and other diseases, the symptoms of shoulder pain when lifting the arm will appear. 3. Frozen shoulder: due to the inflammation and edema of the ligaments and joint capsule around the shoulder joint, typical symptoms of lifting-like pain may appear. 4. Cervical spondylosis: due to the degeneration of the cervical vertebrae causing nerve compression in the upper limbs, there may be shoulder pain when the arm is lifted, accompanied by numbness of the upper limbs, restricted activities and other symptoms. 5. Other diseases of the shoulder joint: such as shoulder joint infection, shoulder joint tuberculosis, shoulder joint tumor and other diseases, can also appear when the arm is lifted to shoulder pain. Shoulder pain when lifting the arm may also have other reasons, if not relieved after rest, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then follow the doctor’s instructions to give targeted treatment or treatment.