High blood pressure can cause lesions in the heart, brain, kidneys, blood vessels, and fundus of the eyes. Stroke, coronary heart disease, and heart failure can all occur due to high blood pressure. High blood pressure creates high pressure on the arterial walls, making them susceptible to atherosclerosis, which can easily occur when hypertension is combined with hyperlipidemia. Atherosclerosis narrows the lumen of blood vessels or causes thrombosis, resulting in blockage of blood vessels and interruption of blood flow. When it occurs in the heart, it causes myocardial infarction, and when it occurs in the brain, it causes cerebral thrombosis. And if a blood vessel that has lost its elasticity and become brittle and hardened ruptures under high pressure, brain hemorrhage or aortic coarctation, etc. can occur. Heart: Hypertension can cause left ventricular hypertrophy, coronary artery disease, heart failure and arrhythmia. The risk of coronary heart disease is 2.6 times higher in patients with hypertension than in those with normal blood pressure. Brain: Stroke, commonly known as stroke, includes cerebral infarction and cerebral hemorrhage. Hypertension is the most important risk factor for stroke, and 70% of stroke patients in China have hypertension. Kidney: Long-term hypertension is likely to cause kidney damage and renal hypofunction, and some patients may develop renal failure. Vascular: Aortic coarctation is the most serious vascular complication, which is dangerous and can be accompanied by shock and even sudden death. Eye: Severe hypertension can lead to sclerosis of small retinal arteries in the fundus, retinal hemorrhage and exudation, and blockage of the central retinal artery or vein, resulting in vision loss and, in severe cases, blindness. Hypertension has many comorbidities and serious consequences, so timely detection and treatment are very important.