Hypertension is the number one risk factor for cardiovascular disease in China and one of the major causes of death from disease worldwide. According to authoritative statistics, the prevalence of hypertension in China is 29.6%, while the awareness rate, treatment rate and control rate of hypertension are only 42.6%, 34.1% and 9.3% respectively, and the blood pressure compliance rate among patients receiving antihypertensive treatment is 27.4%, which is significantly lower than that of developed countries and regions. At present, China also has 10 million new cases of hypertension each year, and now the number of hypertensive patients has reached 300 million. For most patients with hypertension, it is extremely important to accurately measure and monitor their blood pressure. If the blood pressure is not measured correctly, it is very easy to misjudge the blood pressure status, which will directly affect the treatment effect and lead to a high incidence of hypertensive complications (heart and kidney failure, stroke). Three aspects of blood pressure measurement must be noted: 1, to be measured in a quiet, comfortable and warm environment, the measured person should not do exercise within 30 minutes before measurement, and rest for at least 5 minutes before measurement. 2, should take a sitting position, keep the middle of the upper arm and the heart at the same level (equal height), do not lie down to measure blood pressure. 3, if possible, if you have the conditions at home to measure the blood pressure before going to the clinic, in order to avoid the influence of the clinic environment interference with blood pressure measurement. Remember not to let your own problems affect the judgment of blood pressure. May 17, 2017 is the 13th World Hypertension Day, and this year’s theme is “Know Your Blood Pressure”. World Hypertension Day has been celebrated by the World Hypertension League since 2006, and for five years, from 2013 to 2018, the theme has been “Know Your Blood Pressure,” with the goal of raising awareness of hypertension among the global population. Currently, hypertension is the number one risk factor for cardiovascular disease and one of the leading causes of death from disease worldwide. In China, up to 50% of cardiovascular disease, chronic kidney disease and diabetes patients die from hypertension, and there are 10 million new cases of hypertension every year, and now the number of hypertensive patients has reached 300 million nationwide. Blood pressure measurement is an important method for diagnosis, assessment, treatment and scientific research of hypertension; standardized and standardized operation is the key to accurate blood pressure measurement. According to the recommendations of the Chinese Blood Pressure Measurement Guidelines, in-office blood pressure is still the more objective and accurate method of blood pressure measurement in common use today. Home blood pressure measurement and/or ambulatory blood pressure monitoring can be used to aid in the diagnosis and treatment of hypertension when available. The first step in proper blood pressure measurement is good preparation, including that the measurement should be done in a quiet, comfortable and warm environment, the person being measured should not exercise for 30 minutes before the measurement, should not drink coffee, eat, smoke, or use medication for nasal congestion one hour before the measurement, empty the bowels and urine, and rest for at least 5 minutes before the measurement. During the measurement, the test subject takes a sitting position with both feet flat and not crossed. The upper arm is exposed and placed on the table, and the middle of the upper arm is tied with a cuff, keeping the middle of the upper arm at the same level as the heart (equal height). Do not talk during the measurement. The sphygmomanometer should be an upper-arm sphygmomanometer certified by the Society for Hypertension Professionals and calibrated regularly according to the manufacturer’s recommendations. If measurements are taken in the office, take 2 measurements (same arm) and take the average of the two. If measurements are taken at home, take 2 measurements each day, morning and evening, for 7 days. Remove the measurement from day 1 and take the average of the blood pressure from the other 6 days. The diagnostic thresholds for hypertension are: 1. Office blood pressure: 140/90 mmHg 2. Home blood pressure: 135/85 mmHg 3. Ambulatory blood pressure: >135/85 mmHg during the day; >130/80 mmHg throughout the day If the systolic blood pressure is between 120 and 139 mmHg or the diastolic blood pressure is between 80 and 89 mmHg, the person is considered pre-hypertensive. This means that unless steps are taken to prevent it, it will eventually progress to hypertension.