Blood pressure is something that everyone has. Most people have normal blood pressure, but some have low and some have high blood pressure.
Blood pressure is the amount of work your heart must do to push your blood around your body. Average Blood pressure readings are around 120/80mmHg. The top number, 120, systolic pressure, is a record of your blood pressure at its highest, as your heart muscles push the blood out of the heart to move around the body. Then as your heart relaxes, between beats, the blood flows back into your heart and this is a record of the bottom number, 80, diastolic pressure.
Generally high blood pressure is 140/90mmHg and low pressure is 90/60mmHg or lower. High blood pressure can affect people of all ages, and often it does not show symptoms. If it is not treated or kept under control it is one of the major risk factors for heart disease and stroke.