High low pressure of blood pressure indicates high diastolic pressure, normal diastolic pressure remains between 60-90 mmHg, diastolic pressure over 90 mmHg is elevated diastolic pressure. Simple diastolic hypertension, i.e. normal systolic blood pressure with increased diastolic blood pressure, is mostly seen in hypertensive patients under 60 years of age. There is no special antihypertensive drug for simple diastolic hypertension, and the treatment is as follows: 1. Diuretics such as hydrochlorothiazide and spironolactone are commonly used to relieve diastolic hypertension; 2. Daily salt intake should be limited to no more than 6g; 3. Patients with hypertension should maintain good lifestyle habits, adopt a light diet with low fat, low sugar and less grease, and perform aerobic exercise appropriately. Diastolic pressure refers to the elastic retraction of the arterial wall of the heart during diastole, and the lateral pressure generated by the blood on the vessel wall. patients with hypertension over 70 years old often show pure systolic hypertension while diastolic pressure is low, which indicates a heavy degree of atherosclerosis. Reasonable and effective treatment can slow down the occurrence of atherosclerosis, help reduce the incidence of hypertension, and improve the prognosis of patients.