Hypertension is the first risk factor for stroke, and the increase in stroke morbidity and mortality is closely related to elevated blood pressure. Studies in China have shown that for every 10 mm Hg increase in systolic blood pressure, the relative risk of stroke increases by 49%, and for every 5 mm Hg increase in diastolic blood pressure, the risk of stroke increases by 46%, after controlling for other risk factors. Hypertension increases the tension of blood vessels, which means that the blood vessels become “tense”. Over time, the elastic fibers of the blood vessel wall will break, causing damage to the vessel wall and making it easier for lipid substances in the blood to penetrate into the lining of the vessel wall, which can cause the brain arteries to lose elasticity and damage the lining of the arteries, resulting in atherosclerosis. If hypertension is poorly controlled for a long time and blood pressure always fluctuates, it can easily cause stroke. Therefore, prevention and control of hypertension is the key to stroke prevention. The attainment of systolic and diastolic blood pressure in hypertensive patients is equally important, and the focus should be on the attainment of systolic blood pressure. The incidence of stroke is significantly reduced when blood pressure levels are <140/90 mm Hg. In hypertensive patients with diabetes and renal disease, the goal of lowering blood pressure should be lower, with 130/80 mm Hg being appropriate. Currently, there are 260 million people with hypertension in China, and the rate of attainment of hypertension control is only 8%. Patients with hypertension can get their blood pressure up to standard and thus prevent strokes in the following ways Monitoring blood pressure. Patients with hypertension, especially the elderly, should monitor their blood pressure frequently to avoid excessive fluctuations and postural hypotension, usually once a day in the morning, once in the afternoon and once in the evening. Review regularly and take medication on time. Regular review at the outpatient clinic, by the cardiovascular professional physician to adjust the medication, the doctor will be based on the patient's situation in the six categories of antihypertensive drugs to choose the appropriate drugs, use the appropriate dose, the implementation of individualized treatment, but also should test the blood sugar and lipid levels, found abnormalities should be actively treated. Change bad habits. Diet, first of all, we should eat less salt, and it is best for a family of three to use no more than 250 grams of salt per month. In addition, we should also pay attention to the "invisible salt", for example, although the cereal contains less sodium, but add alkali buns contain high sodium, eat 250 grams of alkali buns equivalent to an increase of 2 grams of salt. In addition, too little potassium intake is also a "helper" of high salt, making people's blood pressure rise. Potassium can be supplemented by eating more seaweed, nori, fungus, yam, bananas and other foods that contain more potassium. In addition, too little physical activity, irregular rest time, smoking and alcohol abuse are also causes of high blood pressure.