The common causes of right arm pain include trauma, humeral epicondylitis, osteoarthritis, etc. If the symptoms persist, it is recommended to seek medical treatment in time. 1. Trauma: If the right arm is hit from outside, it is easy to cause muscle and ligament strain or fracture at the elbow joint, which in turn causes pain at the bend of the right arm. 2. Epicondylitis of the humerus: usually occurs in people who work hard on the forearm, also known as “tennis elbow”. Patients will show pain on the outside of the elbow joint, and there will be pressure points on the epicondyle of the humerus. 3. Osteoarthritis: The articular cartilage in the right arm bend will undergo degenerative changes with age, which in turn will show pain in the elbow as well as restricted activities. Causes of right arm pain are more reasons, such as chronic strain, cervical spondylosis, rheumatoid arthritis, bone tumors, etc., if the symptoms continue to be unrelieved, it is recommended to go to the hospital in a timely manner to improve the relevant examinations, to determine the cause of the disease, and then comply with the doctor’s instructions for targeted treatment, so as to avoid delays in the condition.