It has been reported that 80% of cerebrovascular patients are associated with hypertension, of which 86% of cerebral hemorrhage and 7 1% of cerebral thrombosis have a history of hypertension. The chance of cerebrovascular disease in asymptomatic hypertension is about four times higher than in normotensive people, while it has also been found in studies that both elevated systolic and diastolic blood pressure have a high risk for cerebrovascular disease. The relative risk of cerebrovascular disease in those with systolic blood pressure >150mmHg is 28.8 times greater than that in those with systolic blood pressure ≤150mmHg! And those with diastolic blood pressure >90mmHg are 19 times more likely than those with diastolic blood pressure ≤90mmHg! All these fully illustrate that hypertension is a major risk factor for cerebrovascular disease. The mechanism of cerebrovascular disease caused by hypertension is mainly caused by accelerated cerebral atherosclerosis. Due to long-term hypertension, it can lead to lesions in the walls of small arteries and thickening of the intima. When the cerebrovascular lumen is narrowed or occluded, it can cause ischemic lesions of cerebral thrombosis due to ischemia and hypoxia in brain tissue. Hypertension can also cause hyaline degeneration and fibrinoid necrosis in the walls of small arteries, which can lead to the formation of tiny aneurysms. When the blood pressure rises suddenly, this already hardened and fragile blood vessel can rupture and bleed, and cerebral hemorrhage can occur.