Right hand back elevation upper arm pain may be due to muscle strain, periarthritis of the shoulder joint, subacromial impingement syndrome and other reasons. 1. Muscle strain: If the patient is suffering from long-term strenuous exercise, it may also cause serious muscle damage, so the muscle diastole and stretching will be restricted when the patient raises the back of the right hand, which will result in the symptom of pain. 2. Periarthritis of the shoulder joint: If the patient suffers from periarthritis of the shoulder joint, the local surrounding tissues may have lesions, and the patient’s activities may be restricted, causing the symptoms of pain in the upper arm when lifting the back of the right hand. 3. Subacromial impingement syndrome: Subacromial impingement syndrome is usually caused by long-term strain or other reasons. When the humeral tuberosity and acromion are repeatedly worn and impacted for a long period of time, it will lead to inflammation under the acromion, so it causes the symptom of pain in the right hand back elevation upper arm. It is recommended that patients should pay attention to rest, avoid overwork, can help the recovery of the condition, if the long-term has not been relieved, but also need to go to the hospital in time for medical treatment.