The causes of arm numbness and pain are more, mainly in the following aspects, cervical spondylosis, cerebrovascular disease, diabetic peripheral neuropathy, peripheral vascular lesions, nerve injury of the upper extremities, etc., and need to improve the examination to clarify the cause of the disease. 1. Cervical spondylosis: in the clinic, it is mainly seen in nerve root cervical spondylosis, when there are osteophytes in the cervical vertebrae, herniated intervertebral discs and other lesions, which cause compression of the nerve root, the patient may show radioactive pain or numbness in the affected upper limb, CT, MRI and other imaging tests can help in the diagnosis. 2. Cerebrovascular lesions: the more common ones are cerebral infarction and so on, because of ischemia and necrosis of brain tissues, which causes numbness and pain in the affected limbs, CT can be done to check. 3. Diabetic peripheral neuropathy: diabetes mellitus patients with poor long-term control often leads to peripheral nerve damage, the affected side of the upper limb can appear soreness, numbness, but mostly symmetrical. 4. Peripheral vasculopathy: It is mainly due to the occlusion of blood vessels in the upper limbs, resulting in insufficient blood supply to the upper limbs and dysfunction of the nerves after ischemia, which is manifested as numbness and soreness of the upper limbs. 5. Upper limb nerve injury: for example, trauma or prolonged card pressure, etc., will lead to upper limb nerve damage, and then lead to its innervation of the arm to appear soreness and numbness symptoms. It is recommended that patients seek medical treatment in time, improve the auxiliary examination, in order to clarify the cause of the disease, and the professional physician for the cause of the corresponding treatment.