Cerebral infarction is sudden. Cerebral infarction is an acute ischemic cerebrovascular disease, often with sudden onset, and the onset in a quiet state or during sleep can be sudden dizziness, nausea, vomiting, also balance disorders, ataxia, dysarthria, mainly seen in the infarction of the vertebrobasilar system, patients can also suddenly develop sensory disorders of the lateral limbs, motor disorders, hemianopia, and also sudden speech dysfunction, including motor Patients can also suddenly develop speech dysfunction, including motor aphasia, sensory aphasia, and mixed sleep aphasia. Severe patients can have sudden onset of consciousness disorders, such as sudden drowsiness and lethargy, or sudden coma, which may suddenly lead to the death of the patient in severe cases. For patients with cerebral infarction, treatment should be given promptly if it develops to prevent sequelae and reduce mortality.