The causes of pain in both arms are mainly seen in the following aspects: first, cervical spondylosis, some patients with cervical spondylosis are prone to cervical disc herniation due to long-term ambulatory work, thus compressing the nerves and causing pain in both arms, and some patients also have limited activity, which requires a cervical MRI examination in the hospital; second, pain in both arms, we need to ask the patient if there was any fever or diarrhea before the disease, and if there is muscle weakness or muscle atrophy. The doctor should consider that the patient may have polymyositis, which also requires a muscle MRI, electromyography and muscle enzyme examination; third, the doctor should also consider whether the patient has taken statin drugs for a long time. The side effects of the drugs can also cause pain in the arms, which also requires a muscle enzyme test to be done in the hospital to clarify the situation.