Hypertension affects the body by causing uncomfortable clinical symptoms such as dizziness, headache, tight neck plate, fatigue, and palpitations. The greatest danger of high blood pressure is to cause damage to the heart, brain and kidney target organs, thus causing various complications of hypertension. The main complications of hypertension are as follows: 1) cerebrovascular disease, including cerebral hemorrhage, cerebral thrombosis, lacunar cerebral infarction and transient ischemic attack; 2) heart failure and coronary atherosclerotic heart disease; 3) chronic renal insufficiency and aortic coarctation. Therefore, patients with hypertension need to be actively treated with antihypertensive therapy to keep the blood pressure in the target range for a long time, so as to reduce the damage to the heart, brain and kidney target organs and to prevent the complications of hypertension.