The most accurate time to measure blood pressure is early morning measurement, for the following reasons: 1, the morning up is the most basic state of activity, not affected by the activity of food, excluding all interfering factors measured blood pressure; 2, morning peak hypertension: is the morning peak when the blood pressure rises to occur cardiovascular events. Because after a night of drug metabolism, may not drug control early morning blood pressure, so want to know if the blood pressure is a peak in the early morning, which in turn will prevent early morning cardiovascular events. In fact, blood pressure is not constant, but has a range of fluctuations. The first peak is 8-10 am, the second peak is 6-8 pm, and the first valley is 2-3 pm, so blood pressure fluctuates and changes. If you have the time, ability and conditions, you can take your blood pressure 3-4 times a day to understand the overall state of blood pressure throughout the day, so that you can better regulate your medication. Also understand whether there are any special points in the day where blood pressure increases, and then take drugs to control blood pressure smoothly.