Why hypertensive patients to long-term treatment?

We normally the primary hypertension refers to hypertension, or high blood pressure in patients over 90%, Because of its etiology has not been completely clear, hypertension medication, and the control can only be cured. Therefore, even if the blood pressure dropped to normal does not mean that the cure hypertension, and the need to adhere to the treatment of life, control of blood pressure, avoid the occurrence of stroke, myocardial infarction, and other serious complications.