Double upper extremity pain caused by many reasons, there are several aspects: first, trauma, acute injuries such as car accidents, fights and brawls, sports accidental falls, skiing falls and other injuries caused by chronic injuries weightlifting athletes long-term overtraining caused. Second, inflammatory, like bacterial, viral infections caused by myositis, dermatomyositis, etc.. Third, allergic reactions and autoimmune diseases, like rheumatoid arthritis, rheumatic myositis caused by. Fourth, degenerative osteoarthropathy, like older obese women are more common, with a family history, often with multi-joint involvement. Fifth, metabolic bone disease, mainly due to vitamin D metabolism disorders such as osteochondrosis, such as insufficient sunlight exposure, poor digestion, vitamin D deficiency and insufficient phosphorus intake. Sixth, tumors of bone and joint, all of which may cause pain in both upper limbs.