Insufficient cerebral blood supply and fainting are mainly due to insufficient blood supply from the vertebral basilar artery, which causes ischemia and hypoxia in the patient’s cerebellum and brainstem. Blood pressure should be monitored in time, and if it is elevated, treatment should be given, and commonly used blood pressure-lowering drugs mainly include amlodipine. If the patient’s blood pressure is normal, heart rate and respiration should be monitored in time, and electrocardiogram should be checked if necessary. If it is caused by cardiogenic diseases, the patient should be hospitalized in time for comprehensive treatment. In addition, it may also be caused by cerebral arteriosclerosis, blood lipids and blood sugar should be monitored, and appropriate treatment should be given when blood sugar and blood lipids are abnormal, and treatment should be given to improve blood circulation, such as oral Xibirin and Vertigo Stop, or oral vitamin E to soften the blood vessels, and in severe cases, intravenous infusion treatment can be given, such as intravenous infusion of Schwedenin, Viburnum Lutong, and Chuanxiongxiongzine. If necessary, cranial magnetic examination should be performed to exclude the possibility of intracranial organic lesions, such as cerebrovascular disease and cerebral infarction.