Hypertension (High Blood pressure) is when your blood pressure frequently goes over140/90. Pre-hypertension is blood pressure readings from 120-139 over 80-89 on most measurements. If you have pre-hypertension, you are likely to develop high blood pressure at some point, unless you make lifestyle changes to lower your blood pressure to normal. Most people feel no symptoms with uncomplicated high blood pressure. (Hipertension)