China is a large country with about 300 million people with hypertension, and the diagnosis rate is low and the treatment rate is low. Often people around us occasionally find themselves with high blood pressure and refuse to take medication because they have no symptoms. Their reason is: I take the medicine so early, what if I become dependent in the future? Every time we see such patients, we are very helpless. Some time ago, we talked about the relationship between hypertension and kidney. Long-term poorly controlled hypertension can cause the decline of kidney function and even deteriorate into uremia. Today we talk about the relationship between hypertension and cerebrovascular disease. China is a large population, the incidence of cerebrovascular disease is very high, whether it is cerebral thrombosis, cerebral embolism or cerebral hemorrhage, have a high rate of disability, lethality. Once these diseases occur, it will be a huge burden to the family and society, and the quality of life of the patients themselves is also very low. About 70% to 80% of patients with cerebrovascular diseases in China are closely related to hypertension. In a large sample size survey, more than 80% of patients with cerebral hemorrhage and more than 70% of patients with cerebral infarction had a previous history of hypertension, and often such patients did not have regular blood pressure control. The occurrence of cerebrovascular disease is related to blood pressure and not to the presence of hypertension combined with symptoms, that is, mainly by hypertension, usually despite the absence of symptoms, there is still a good incidence of cerebrovascular disease. According to statistics, patients with asymptomatic hypertension have four times the chance of developing cerebrovascular disease than those with normal blood pressure, and it was also found in the study that either elevated systolic or diastolic blood pressure has a high risk for cerebrovascular disease. The relative risk of cerebrovascular disease for those with systolic blood pressure >150mmhg is more than 20 times that of those with systolic blood pressure ≤150mmHg, while for those with diastolic blood pressure >90mmhg, it is more than 10 times that of those with diastolic blood pressure ≤90mmHg. All of these fully illustrate that hypertension is an important risk factor for cerebrovascular disease. Why does hypertension cause cerebrovascular disease. On the one hand, long-term hypertension can lead to lesions in the walls of small arteries, luminal narrowing, intimal thickening, and atherosclerosis formation. When the cerebrovascular lumen is further narrowed or the plaque ruptures and thrombosis occurs, the blood vessel becomes occluded, which can cause necrosis due to ischemia and hypoxia of brain tissue. In addition, hypertension can also cause hyalinosis and fibrinoid necrosis of small artery walls, which can lead to the formation of tiny aneurysms. When blood pressure fluctuates widely and rises suddenly, this already hardened and fragile vessel can rupture and cerebral hemorrhage can occur. There is also a high incidence of atrial fibrillation in patients with hypertension. Atrial fibrillation causes blood to stagnate in the atria and ears, further forming thrombi. In exceptional cases these clots can dislodge and block along the arterial vessels to the brain, causing severe symptoms of cerebral embolism. Emboli caused by atrial fibrillation are often larger and can block the more important arteries, and symptoms can be severe and even life-threatening. Despite the absence of symptoms, if you find that your blood pressure is elevated, be sure to take regular blood pressure measurements and control it effectively. Good blood pressure control can significantly reduce the incidence of cerebrovascular disease. It is also important to adjust your lifestyle, eat a low-salt diet, and avoid staying up late to lower your blood pressure in concert.