There are many causes of right arm pain, because the arm and the shoulder, wrist and hands construct an extremely precise and complex movement system, in which any one part of the problem, may trigger right arm pain. Common causes mainly include muscle strain, cervical spondylosis, right-sided frozen shoulder, trauma, right-sided lung disease, etc.: 1, muscle strain: long-term engagement in work that requires repetitive arm movements, such as carpentry, masonry, chef, etc., or long-term arm sports, such as tennis, resulting in excessive arm strain, muscle strain, and then arm pain; 2, cervical spondylosis: refers to cervical disc degeneration and its Cervical spondylosis: refers to cervical disc degeneration and its secondary changes, irritation or compression of the adjacent spinal cord, nerves, blood vessels and other tissues and a series of symptoms and signs of the syndrome. Most of them are related to long-term low head, work at desk, etc. Clinical manifestations are neck and shoulder pain and radiation to the arm, and then right arm pain; 3. Right frozen shoulder: it refers to the chronic inflammatory disease that occurs when the capsule of the shoulder joint and its surrounding ligaments, tendons and bursa are damaged due to various reasons. Early manifestation of shoulder joint pain, with the progress of the disease, the patient’s pain range expansion, will involve the right arm; 4, trauma: if the right arm by external impact and other traumatic injuries, local soft tissue damage or fracture and so on, will also induce pain in the right arm; 5, the right side of the lung disease: such as infection or tumor in the right upper lung, the stimulation of inflammation and infection may be radioactive right arm pain, and the other is the tumor compression of local nerves. In addition, local pain may also occur when the tumor compresses the local nerves.