Low blood pressure and insufficient cerebral blood supply should be given to actively correct hypotension and improve cerebral blood supply, which is usually treated clinically by intravenous infusion of hydroxyethyl starch for volume expansion. Intravenous saline with blood soothing agents or drugs to improve blood circulation, such as cytarabine, can also be used. Patients with cerebral insufficiency can also be given drugs to improve blood circulation, such as vincristine or chuanxiongzin. Patients with hypotension should also actively search for the cause and treat the cause accordingly. Low blood pressure tends to cause cerebral perfusion deficiency, which can cause cerebral blood supply deficiency and ischemia and hypoxia in the patient’s brain. Clinically, it is divided into insufficient blood supply to the vertebrobasilar system and insufficient blood supply to the internal carotid artery system, and patients can present with a variety of different clinical signs and symptoms.