Diabetic arm pain may be caused by peripheral neuropathy, cervical spondylosis, frozen shoulder and so on. 1. Peripheral neuropathy: During the period of diabetes mellitus, if the blood glucose control is not satisfactory, it will affect the endocrine function and make the peripheral nerves have an inflammatory reaction, which will cause the phenomenon of arm pain. 2. Cervical spondylosis: prolonged low head work or incorrect sitting posture and other factors will lead to cervical vertebrae and the surrounding tissue structure disorders such as hyperplasia, degeneration and other aseptic inflammation, which affects the blood circulation of the arm, and then the symptoms of pain. 3. Frozen shoulder: Long-term fatigue exercise or cold will lead to shoulder joints and the surrounding muscles, tendons and other soft tissues of aseptic inflammation, thus causing arm swelling, pain and other symptoms. If diabetic patients have symptoms of arm pain, it is recommended to go to the hospital in time for a comprehensive examination to clarify the cause of the disease.