Are you worried about high blood pressure in yourself, a family member, or a friend? Your concern is well-founded. If left untreated, high blood pressure — also called hypertension — can lead to a range of health problems, including heart disease and stroke. Knowing more about high blood pressure can help you prevent this condition from damaging your health, or the health of someone you love. You can start by learning what’s true about this condition — and what’s not. Here are five common misconceptions about high blood pressure.