Normal low pressure is normal diastolic blood pressure, high pressure is high for patients with high systolic blood pressure as the main hypertension, the causes of this situation are mainly family hereditary reasons, but also may be caused by unknown reasons. In addition, some people may develop high blood pressure as they age, and people with adrenal space, renal stenosis, craniocerebral space, mental stress, or psychosomatic disorders may also develop systolic blood pressure as the main cause of hypertension. If you want to further identify the cause of the disease, it is recommended that the patient can do adrenal CT, renal vascular ultrasound, cranial CT and hypertension six lab tests, which will help to make a preliminary diagnosis. At present, 90% of people with hypertension are due to unknown causes or heredity, and the probability of finding secondary factors is still very low.