140/90 is considered borderline hypertension
so you need to lower it. Cut back on caffeine, stop smoking
if you smoke, cut out salt (this includes soda, especially diet soda which is loaded with sodium) control your stress
, exercise, eat healthy, if you are overweight
, diet. The old 100 plus your age readings went out years ago, now 120/80 is the normal BP and 140/90 is borderline hypertension so you need to lower it.