@clevelandclinic: Blood pressure is the amount of force your blood uses to get through your arteries. When your heart pumps, it uses force to push oxygen-rich blood out to your arteries. They bring it to your body’s cells and tissues. If your blood pressure is too high, it can cause health issues. The only way to know your blood pressure is to measure it. Each time your heart beats, it pumps blood into arteries that carry blood throughout your body. This happens 60 to 100 times a minute, 24 hours a day. Arteries deliver oxygen and nutrients to your whole body so it can function.