Patients with numbness in the head and half of the body mainly consider the following causes: firstly, if the onset is acute, cerebrovascular disease should be considered, and if the onset is during activity or emotional excitement, cerebral hemorrhage is more likely. If the onset is during sleep or rest, cerebral infarction should be considered, which can be clarified by CT head examination; secondly, intracranial tumors and intracranial occupying lesions should be considered. In the course of the disease, the patient may have headache, nausea and vomiting; thirdly, if the patient has a history of head trauma, the patient’s head and half of the body are numb, and the patient should also consider that it is caused by subdural hematoma.