Sudden numbness of the face is considered to be caused by damage to the sensory nerves of the face, mainly the trigeminal nerve, which innervates the sensation of the face. The trigeminal nerve can be affected by intracranial ischemia, poisoning, tumor and metabolic diseases, which can lead to trigeminal nerve damage, and then the patient has abnormal facial sensation. Sudden onset of facial numbness is considered to be common in ischemic cerebrovascular disease, which can be seen in cerebral infarction or transient ischemic attack. Sudden facial numbness may be accompanied by dizziness, headache, numbness and weakness of the limbs, and in severe cases, paralysis, and also symptoms of neurological deficits such as dumb speech. In patients with transient cerebral ischemia, the numbness lasts for a few minutes to ten minutes, and rarely exceeds one hour. For ischemic cerebrovascular disease, patients can be given symptomatic treatment such as antiplatelet aggregation, improving circulation, activating blood circulation and removing blood stasis.