Scalp numbness, arms also easily numb is mainly seen in the following aspects of the cause: 1, if scalp numbness accompanied by bilateral numbness of the arms, numbness of the upper limbs, but also upper limb weakness, and also young and middle-aged patients, to ask the patient whether there is no lower limb numbness and weakness. If so, consider that the patient may have Guillain-Barre syndrome, which requires electromyography and lumbar puncture; 2. Ask the patient whether he or she has any cerebrovascular risk factors such as dizziness, headache, slurred speech, choking on drinking water, hypertension, diabetes mellitus and so on, and if so, he or she needs to go to the hospital for a cranial magnetic resonance test to find out whether there is any cerebral infarct, hemorrhage, or space-occupying lesions of the head; 3. Consider also whether the Whether the patient has cervical spondylosis, because cervical spondylosis, cervical and cervical disc herniation can also compress the nerves, which can cause numbness of the scalp or arms.