Blood pressure 123/86 means systolic blood pressure 123mmHg, diastolic blood pressure 86mmHg, this blood pressure is normal. The normal high value of blood pressure is systolic blood pressure at 130mmHg~139mmHg and/or diastolic blood pressure at 80mmHg~89mmHg, when the human body’s blood pressure is measured systolic blood pressure 123mmHg, diastolic blood pressure 86mmHg is normal, systolic blood pressure belongs to the completely normal range, diastolic blood pressure belongs to the normal high value, i.e., it is slightly higher but does not exceed the normal value range. When blood flows in the blood vessels, the lateral pressure on the walls of the blood vessels is called blood pressure. Measurement of blood pressure is powerful in assessing the level of blood pressure in the organism, diagnosing hypertension and observing the efficacy of antihypertensive therapy. The examinee should not smoke, drink strong tea, coffee or other beverages for half an hour before the blood pressure measurement, empty the bladder, and measure the blood pressure in a quiet environment and in a quiet state. It is recommended that blood pressure can be measured several times at different times of the day to observe the changes in blood pressure, and if necessary, consult a specialized hospital for further evaluation.