The causes of symmetrical pain in both arms may be exertion, cervical spondylosis, rheumatoid arthritis and so on. 1. Exhaustion: due to strenuous exercise or heavy physical work and other reasons lead to a large number of lactic acid aggregation, stimulation of the muscles caused by the two sides of the arm to the sinking pain. 2. Cervical spondylosis: the protruding cervical intervertebral discs compress the nerve roots innervating the upper limbs on both sides, resulting in pain and numbness in both arms, accompanied by pain in the neck and shoulders. 3. Rheumatoid arthritis: Rheumatoid arthritis usually develops symmetrically, causing symmetrical pain in both arms. Symmetrical pain in both arms may also have other causes, such as aseptic inflammation, ischemic lesions in both upper limbs, etc. It is recommended to go to the hospital in time to find out the cause of the disease and then targeted treatment.