Diastolic pressure is the pressure of blood present in the arteries between heartbeats, i.e. the pressure when the heart is not actively pumping blood into the arteries. After the heart completes a contraction, the ventricles diastole in order to replenish blood in preparation for the next contraction. This period of ventricular diastole is called “diastole” and the blood pressure during diastole is called diastolic blood pressure. High blood pressure during diastole is called diastolic blood pressure. Because diastole is short, the amount of blood that flows through the body’s small arteries and into the peripheral vasculature decreases in a short period of time, the amount of blood in the aorta at the end of the heart’s diastolic period increases, which leads to an increase in the body’s diastolic blood pressure, which also leads to a high low blood pressure. Another reason is that when peripheral resistance increases, the flow of blood from the aorta to the peripheral vasculature will slow down accordingly, so the blood remaining in the aorta increases, and the phenomenon of increased low pressure occurs. The first thing that patients with high blood pressure should do is to rest, relieve pressure and relax themselves fully. For patients with high diastolic blood pressure, if it occurs frequently, attention should be paid to the possibility of leading to more typical hypertension, especially for elderly patients, because with the increase of age, the prognosis of patients will be poorer. For patients with elevated diastolic blood pressure, if the effect of non-pharmacological treatments is not good, medication should be considered. For patients with elevated diastolic blood pressure, medications should be considered if non-pharmacological treatments are not effective, and a low-salt diet, which means not eating too much salt, should be limited to 6 grams of salt per day.