Cerebral infarction is a major disease. Cerebral infarction is a common disease of the nervous system and a multi-morbidity, mostly occurring in middle-aged and elderly people, with a high death and disability rate, which seriously affects the quality of life of patients. It is a kind of limited ischemic necrosis and softening of brain tissues caused by various causes of impaired blood supply to the brain, which leads to ischemic and hypoxic changes in the brain. Patients can present with a variety of different signs and symptoms, depending mainly on the vessels involved in the lesion and the size of the infarct focus. Patients with large infarcts generally have more severe clinical symptoms and signs, and in addition to somatic neurological symptoms and signs, most patients have impaired consciousness, cerebral edema and increased intracranial pressure. Severe intracranial pressure increase can cause brain herniation, which can even lead to patient death, and patients with impaired consciousness generally have a poor prognosis. If the symptoms and signs are mild in small infarcts, most patients only show signs and symptoms of focal neurological deficits, no impairment of consciousness, no cerebral edema and no intracranial pressure increase, and the prognosis is better.