The main risk factor for stroke is hypertension. Elevated blood pressure is also a trigger for many diseases, increasing the risk of coronary heart disease, heart failure and kidney disorders. Because some hypertensive patients do not have obvious clinical symptoms, hypertension is also known as the “invisible killer” of human health, so it is extremely important to raise awareness of hypertension for early prevention and timely treatment. Hazards of hypertension 1. Pre-existing hazards (1) headache, mostly in the back of the head, accompanied by nausea, vomiting and other symptoms. If you often feel a headache, and very intense, and at the same time nausea and vomiting, it may be the direction of malignant hypertension into a signal; (2) vertigo, female patients appear more, may be in a sudden squatting or standing up to feel; tinnitus, tinnitus in both ears, lasting longer; (3) palpitations shortness of breath, hypertension will lead to cardiac hypertrophy, heart enlargement, myocardial infarction, cardiac insufficiency, these are the symptoms that lead to palpitations (4) insomnia, mostly difficulty in falling asleep, early awakening, unrestful sleep, easy to have nightmares, easy to wake up. This is related to cortical dysfunction and autonomic dysfunction; (5) numbness of the limbs, commonly numbness of the fingers and toes or an ant-like sensation of the skin, and inflexibility of the fingers. Other parts of the body may also appear numbness, may also feel abnormal, and even hemiplegia. 2, the late damage (1) damage to the blood vessels: hypertension aggravates the systemic small arteriosclerosis, so that the heart, brain, kidneys and other important organs occur ischemia, hypoxia, impaired function; the formation of atherosclerosis, easy to cause blood vessels, thrombosis; can also form aneurysms, once the blood pressure rises suddenly, the rupture of the aneurysm is life-threatening. (2) Damage to the heart: high blood pressure increases the load on the heart, which can easily lead to ventricular hypertrophy and further lead to hypertensive heart disease, coronary heart disease, heart failure, and heart rhythm disorders. (3) Brain bleeding and cerebral infarction are common in the brain. (4) Make the kidney atrophy, which then leads to kidney function. 3, hypertension can cause serious complications Hypertension is one of the most common diseases that seriously endanger people’s health, the danger of hypertension should not be underestimated, but many patients due to the lack of due knowledge of self-care, do not pay attention to regular monitoring of blood pressure, so that hypertension is not timely and effective control, the heart, brain, kidney three important vital organs will be a fatal blow, resulting in serious complications. (1) Causing cerebrovascular disease: The main direct complication of hypertension is cerebrovascular disease, especially cerebral hemorrhage. A group of 312 hospitalized patients with essential hypertension were followed up for a long period of 15 years-18 years, and 97 cases died due to cardiac, cerebral and renal complications, accounting for 74.6% of all causes of death. In the prospective 27-month follow-up observational study of 596 elderly patients with hypertension, the cumulative incidence of cardiovascular and cerebrovascular disease was 68.79%, and the cumulative incidence of cerebrovascular disease was 36.91%. The study showed that the higher the blood pressure, the higher the incidence of complications. A study on the relationship between blood pressure and stroke in 5456 people over 15 years of age in Baoshan District, Shanghai showed that within 9 years of follow-up, cerebrovascular disease in patients with hypertension accounted for about 70% of cerebrovascular disease in the whole population. (2) Cause kidney disease: long-term hypertension can lead to small renal artery sclerosis. When the kidney function is reduced, it can cause nocturia, polyuria, urine containing protein, tubular and red blood cells. Low urinary concentration function, phenol red excretion and urea contouring are impaired. Azotemia and uremia may occur. (3) Causes sudden death: sudden death is the most urgent clinical state. It is manifested by the sudden onset of respiratory and cardiac arrest, loss of consciousness, and often death within one hour. Hypertension is a high-risk factor for sudden death because of the increased load on the left ventricle, which leads to left ventricular hypertrophy and susceptibility to arrhythmia and coronary artery disease. Sudden death from coronary artery disease accounts for about 90% of all sudden cardiovascular deaths. (4) lead to a variety of lesions: hypertension can also lead to heart, brain, kidney and vascular lesions, left ventricular hypertrophy, congestive heart failure, aortic coarctation, chronic renal failure and other serious life- and health-threatening complications.