Hypertension, commonly known as high blood pressure, is a medical condition characterized by elevated pressure in the arteries.

Blood pressure is the force exerted by the blood against the walls of the blood vessels as it circulates through the body. It is measured using two values: systolic pressure (the pressure when the heart contracts) over diastolic pressure (the pressure when the heart relaxes between beats). The unit of measurement is millimetres of mercury (mmHg).