In general, the most accurate time to measure blood pressure is in the morning when you get up. Usually, when a person gets up in the morning and lies still in bed for about 5 minutes, this is the most accurate time to measure blood pressure throughout the day, when the human body is in a basic resting state, when it will avoid some external factors to interfere, so this time can reflect the normal blood pressure state of the human body completely. However, it is also possible to measure blood pressure at other times of the day. It is important to be quiet for about 15-30 minutes when measuring blood pressure, and to avoid measuring blood pressure when the heart is racing or when you are anxious or agitated, and to avoid measuring blood pressure after exercise or on a full stomach, or when you have been drinking alcohol.