Normal high pressure and high low pressure, i.e. normal systolic blood pressure and high diastolic blood pressure, belong to simple diastolic hypertension, which may be related to high salt diet, obesity, heredity, and high mental stress. Simple diastolic hypertension is mainly seen in middle-aged and young people. 1. Often high salt diet will cause sodium and water retention in the body, resulting in an increase in blood volume, but also activate the renin-angiotensin-aldosterone system to constrict blood vessels, thus increasing the resistance of the peripheral vasculature, resulting in high diastolic blood pressure. 2. Diastolic blood pressure is mainly affected by peripheral vascular resistance and heart rate, while high peripheral vascular resistance and high heart rate can make diastolic blood pressure high. Therefore, when mental tension and pressure are high, the sympathetic nerves will be excited, peripheral blood vessels will contract and heart rate will accelerate, thus making the diastolic blood pressure high. 3. Obese patients due to fat accumulation, can make the blood vessel wall tension increase, so that the peripheral vascular resistance increases, resulting in high diastolic blood pressure. Simple diastolic hypertension should pay attention to adjusting lifestyle in daily life, such as scientific exercise, reducing sodium intake, avoiding high-fat diet, etc. In addition, the patient should choose the best choice under the doctor’s guidance, so as to avoid the risk of diastolic hypertension. In addition, appropriate medication should be chosen under the guidance of a doctor.