If a middle-aged person develops high blood pressure, the condition may be due to a family genetic cause, or it may be triggered by an unknown cause. These two types of causes account for 90% of the causes of hypertension, and about 10% of the causes are due to other causes, such as cranial occupancy, adrenal occupancy, renal vascular stenosis, pregnancy, and possibly mental stress, anxiety disorders, and other causes secondary to elevated blood pressure. There are many causes of elevated blood pressure, with primary and unknown causes accounting for the majority. If you want to further clarify what causes it, the main clinical tests are head CT, adrenal CT, renal vascular ultrasound and preliminary screening of the six items of hypertension.