When the right arm is lifted upwards, pain is produced in the upper arm. The following causes are common: First, periarthritis of the shoulder joint, periarthritis of the shoulder joint is caused by soft tissue lesions around the shoulder joint and causes shoulder joint pain and restricted activities, which can radiate to the upper limb. It occurs in middle-aged and elderly people around 50 years old, and the cause of the disease is related to repeated accumulative injury of the shoulder joint, insufficient movement of the shoulder joint, and acute trauma, and the clinical manifestation is shoulder pain, which can The clinical manifestation is shoulder pain, which can be radiated to the upper extremity. The pain is more obvious at night and even affects sleep, and the shoulder joint activity is limited, so that it is impossible to finish combing the hair or touching the back with the hand. Secondly, subacromial impingement syndrome is caused by repeated impingement and wear of the acromion and the greater tuberosity of the humerus, resulting in inflammation of the subacromial space, which is clinically manifested as pain in the shoulder and deltoid dominant area when the arm is lifted upward.