Successive blood pressure measurements on the same arm are usually taken 5 minutes apart. Measurement of blood pressure, sphygmomanometer cuff will be inflated to increase the pressure until the pressure closed blood vessels, which will lead to temporary ischemia of the upper extremities, oxygen deprivation, so after a blood pressure measurement, you should let the arm rest for a while so that fresh blood to refill the upper extremities, generally 5 minutes. Measurement of blood pressure and other matters needing attention, such as blood pressure measurement before the patient should rest in a quiet environment for at least 5 minutes, the air cuff should be wrapped at least 80% of the upper arm, take a seated position after the patient’s upper arm on the table should be placed with the heart at the same level, and so on. In addition, you should choose to measure blood pressure when it is high, the best time is usually 6:00-8:00 am or 4:00-6:00 pm, measuring 2-3 times to take the average value. If your doctor recommends monitoring your blood pressure, you can record your blood pressure after each measurement to keep track of fluctuations. If large fluctuations in blood pressure are found, it is recommended to actively seek medical attention to identify the cause.