BP is short for blood pressure in medicine. The formation of blood pressure is the lateral pressure of flowing blood on the walls of blood vessels. If the blood pressure is greater than 140/90mmHg, it belongs to hypertension, which can be categorized into primary hypertension and secondary hypertension, the former is mainly related to genetic factors, and the treatment requires long-term use of antihypertensive drugs. Secondary hypertension is secondary to certain diseases, such as kidney disease, renal artery stenosis, primary aldosteronism, pheochromocytoma, etc., all need to be further examined to exclude, treatment needs to be given to the original disease to give the appropriate intervention, purely taking antihypertensive drugs, the general effect of the poorer, can not be very good control of blood pressure. Normalizing and stabilizing blood pressure control can reduce the occurrence of many hypertensive complications, such as cerebral hemorrhage and cardiac insufficiency.