Hypertensive patients will suddenly faint, if the blood pressure is too high to cause hypertensive encephalopathy, resulting in insufficient blood supply to the brain, there will be fainting, fainting, hypertensive patients with poor blood pressure control will cause acute cerebral hemorrhage or cerebral infarction, there will be a sudden fainting, high blood pressure patients with aortic coarctation, rupture of the aortic coarctation, resulting in fainting, fainting. For patients with poorly controlled blood pressure, they should take antihypertensive drugs to actively control their blood pressure to avoid cardiovascular and cerebrovascular complications caused by high blood pressure, which can lead to fainting, and seriously lead to cardiac and respiratory arrest.