Ambulatory Blood Pressure (BP) monitoring is a painless non-invasive method to obtain BP recordings over a 24-hour period. It involves wearing a small cuff around the non-dominant arm, which is then attached to a small monitoring device worn on a belt fastened around the waist. The cuff will automatically inflate at regular intervals throughout the 24-hour period, usually every 20 minutes throughout the day and hourly after 11pm.The readings can then be used to determine whether the person requires medication for high BP or if the current medication is having the desired effect on blood pressure.