If the patient’s blood pressure is measured, the factors that cause the patient’s blood pressure to be high may be due to the patient being white coat hypertensive, which is caused by psycho-psychological factors, and seeing a white coat or being measured in the office will make the patient more nervous, resulting in abnormal blood pressure performance. In addition, the patient’s blood pressure will also be high if it is measured just after smoking, or if the patient goes to measure blood pressure while holding urine. Patients who have just climbed the stairs or taken a blood pressure measurement without resting for 3-5 minutes will also have a high blood pressure. To objectively assess a patient’s overall blood pressure over a 24-hour period and to determine whether abnormal blood pressure or hypertension is present, it is often recommended that the patient have a 24-hour ambulatory blood pressure monitor.