Patients with massive cerebral infarction generally have heavy clinical symptoms and signs, and in addition to somatic neurological symptoms and signs, most patients can have impaired consciousness, can have cerebral edema and increased intracranial pressure, and can cause brain herniation in case of severe increased intracranial pressure, leading to direct death of the patient. And the hospitalization cost is large and the prognosis is poor. Patients with small cerebral infarction generally have mild clinical signs and symptoms, most of which manifest as signs and symptoms of focal neurological deficits, such as hemiparesis, hemianopia, hemianesthesia, and may also have speech dysfunction. In addition, patients may also present with dizziness, nausea, vomiting, balance disorders and ataxia as well as dysphagia and choking on water, usually without impairment of consciousness, cerebral edema and increased intracranial pressure.