Benign hypertension, also known as slow progressive hypertension, accounts for about 95% of hypertension, and malignant hypertension, also known as acute hypertensive disease, accounts for about 5%. The difference between benign hypertension and malignant hypertension is divided into two aspects, 1, the speed of progression, benign hypertension disease progresses slowly, gradually appear fine arteries glassy degeneration, atherosclerosis, some patients more than ten years or decades before the emergence of cerebral thrombosis, cerebral hemorrhage, acute myocardial infarction, renal failure and other complications, while malignant hypertension is mostly seen in adolescents mainly involving the kidneys, fibrinoid necrosis occurs, earlier 2, blood pressure level, benign hypertension patients blood pressure is usually below 180/110mmHg, blood pressure can be easily controlled, while malignant hypertension blood pressure is usually above 220/130mmHg, and blood pressure is not easy to control.