High blood pressure readings vary among individuals, but generally your blood pressure should be 120/80. If it is 140/90 or more, you have “hypertension.” That means you have high blood pressure. It is important to realize that these numbers are just guidelines. The same person may feel perfectly well with a systolic (top number) of 140 and a diastolic (bottom number) of 90, but feel lousy if those numbers change to 150/90. For some people, 140/80 might be normal, while for others it may indicate hypertension. Blood pressure is not something you should try to diagnose yourself. If you have symptoms of hypertension, see your doctor and get it checked out.