The normal range of blood pressure is systolic pressure less than 120mmHg and diastolic pressure less than 80mmHg. Blood pressure is the lateral pressure of blood acting on the walls of blood vessels as it flows through the vessels, and is the driving force behind the ability of blood to flow through the vessels.The normal range of blood pressure for a normal person is systolic blood pressure of less than 120 mmHg and diastolic blood pressure of less than 80 mmHg.Normal high values of blood pressure are 120-139/80-89 mmHg.A lowered or elevated blood pressure may be harmful to the body, and the maintenance of a certain level of blood pressure is the basic for physiologic activity. Patients with normal high blood pressure need to strengthen the control of blood pressure. For people with unstable blood pressure, they need to monitor their blood pressure on a regular basis, and if their blood pressure is too high, they need to consult a doctor in a timely manner, change their lifestyles under the guidance of a doctor, and use antihypertensive drugs and other methods to control their blood pressure. If the blood pressure is abnormal on three occasions not on the same day, it is recommended to consult a doctor in time to avoid delaying the condition.