Low diastolic blood pressure is mainly caused by poor compliance of the patient’s blood vessels, especially in the elderly, because in older patients, the elasticity of the blood vessels decreases. In addition, there are pathological conditions, such as aortic valve insufficiency, that can also cause low diastolic blood pressure as measured by the sphygmomanometer. Low diastolic blood pressure is a manifestation of decreased compliance of the patient’s arteries, so there will be normal or elevated systolic blood pressure, while low diastolic blood pressure is usually an increase in pulse pressure, that is, systolic blood pressure does not decrease while diastolic blood pressure decreases. If a patient with atherosclerosis develops low diastolic blood pressure, it is still very common in the clinic, and when diastolic blood pressure decreases below 60 mm Hg, if the patient has dizziness If the patient has dizziness, fainting, falling, etc., it is necessary to actively look for the cause and timely treatment, if the heart disease, especially when there is myocardial infarction, must pay attention to the low diastolic blood pressure caused by the decline in cardiac function, to actively treat. Adequate rest, timely detection of changes in blood pressure, especially attention to the adverse effects of low diastolic blood pressure on patients, pay attention to the protection of vital organs. Low diastolic blood pressure can be improved by eating right, exercising, controlling weight and stopping smoking and drinking. And it is important to reduce the salt intake in the diet, which is closely related to the elasticity of blood vessels.