Low pressure and high pressure may be caused by too fast heart rate, obesity or some genetic factors. Hypotension and high blood pressure are also a kind of hypertension, which may be primary hypertension or secondary hypertension. If it is primary hypertension, there is generally no clear cause. If it is secondary hypertension, it may be caused by some diseases, such as renal vascular stenosis, kidney disease, primary aldosteronism, or eosinophil tumor. If it is primary hypertension, you need to take antihypertensive drugs to control your blood pressure. If it is secondary hypertension, you need to identify the cause, and remove the cause to make your blood pressure return to normal.