The greatest danger to patients with hypertension is that it causes damage to target organs such as the heart, brain, and kidneys, which leads to the occurrence of various complications caused by hypertension. Hypertension often causes cerebrovascular disease, cardiovascular disease, kidney disease and vascular disease: 1. cerebrovascular disease can cause cerebral hemorrhage, cerebral thrombosis, transient ischemic attack and lacunar infarction. 2. cardiovascular disease can cause hypertensive heart disease and coronary heart disease. 3. kidney disease can cause chronic renal insufficiency. 4. vascular disease can cause aortic coarctation. Therefore, patients with hypertension need to actively carry out antihypertensive treatment to control blood pressure in the target range for a long time, so as to reduce the damage to the heart, brain, kidney and other target organs, prevent the occurrence of various complications, and thus improve the prognosis of patients with hypertension.