Normal diastolic blood pressure is 60～90mmHg, diastolic blood pressure 57mmHg is lower than the lower limit of normal value, belongs to low blood pressure or in the state of low blood pressure. If the patient only has a decrease in diastolic blood pressure, not accompanied by other symptoms, can be seen in long and thin people, may also suggest that in the physiological state of low blood pressure, can be caused by dehydration, sudden changes in body position and other factors, after rehydration or rest, blood pressure can be restored to normal. If the patient is accompanied by other discomforts, such as fatigue, headache, dizziness, depression, pale skin, loss of appetite, etc., then it is called pathologic hypotension, which can be caused by a variety of diseases, including endocrine diseases (e.g., hypothyroidism, etc.), neurological disorders (e.g., multiple sclerosis, etc.), cardiovascular diseases (e.g., congestive heart failure, etc.), and blood volume insufficiency. Patients with diastolic blood pressure of 57mmHg, who are not relieved by rest or who are accompanied by other discomforts, should consult a doctor in time to find out the cause of the disease under the doctor’s guidance, and if necessary, carry out appropriate treatment.