Low diastolic blood pressure in young people is commonly associated with physiological hypotension, which is mainly influenced by genetic factors and has no major impact on human health, and generally the symptoms are not obvious and do not require special treatment. The causes of lower diastolic blood pressure in young people are also the reduction in the amount of echo blood, poor vascular compliance, slow vasodilatation blood flow, insufficient effective circulating blood volume and other reasons, commonly due to a number of diseases, such as congenital heart disease, severe heart failure, severe heart valve disease, as well as suffering from tuberculosis and tumors and other diseases, physical exertion, patients often manifest symptoms such as brain hypoxia, dizziness, weakness, numbness of the limbs, etc. Active treatment of the primary disease is required.