Cerebral insufficiency is a disorder of blood supply to the brain caused by various reasons, which leads to ischemic and hypoxic changes in the brain. Patients may experience dizziness, nausea, vomiting, ataxia, and balance disorders, as well as hemiparesis, hemianesthesia, hemianopsia, speech dysfunction, and vegetative dysfunction. If there is chronic cerebral hypoperfusion, it usually does not directly lead to death, but patients with severe cerebral hypoperfusion can cause cerebral infarction, which may cause death if the infarct area is large and not treated in time.