Today I am going to talk about “Measuring blood pressure, are you doing it right?” Hypertension is one of the most common cardiovascular diseases that endanger human health, and its awareness, treatment and control rates are very low. Because hypertension is usually asymptomatic, many people are unaware of its presence in the early stages. The only way to determine if you have hypertension is to have your blood pressure measured. Therefore, it is important to understand blood pressure and know how to measure it. So what are the criteria for diagnosing hypertension? Hypertension is defined as a systolic blood pressure ≥ 140 mmHg and/or a diastolic blood pressure ≥ 90 mmHg measured three times on different days without the use of antihypertensive medication. Of course, there are several levels of hypertension, and our normal blood pressure is below 120/80mmHg. If you monitor your blood pressure at home, we generally consider a home self-measured blood pressure above 135/85mmHg to be the diagnostic criteria. Next, we will focus on home blood pressure measurement. For home blood pressure measurement, we use an upper-arm home automated electronic blood pressure monitor certified by the International Standard Program, which is one of the indirect methods of blood pressure measurement, mainly by measuring the brachial artery pressure with the help of a blood pressure monitor to respond to such a situation of human blood pressure. Compared to the wrist blood pressure monitor, the measurement of the arm blood pressure monitor is more accurate. For the first 30 minutes of blood pressure measurement, do not smoke, drink alcohol, exercise, or hold urine. Then, rest quietly for at least five minutes; when taking the measurement, choose a quiet, relaxed environment with our upper arms exposed or wear thin clothing. In a sitting or lying position, wrap the cuff around the upper arm with a cuff that is loose enough to insert a finger. In the sitting position, choose a chair with a backrest and place the cuffed hand on the table, not suspended, at the level of the heart, with the legs naturally relaxed and the feet flat. Also avoid body movement and limb movement, and do not talk. For patients with newly diagnosed hypertension or unstable hypertension, it is recommended to measure blood pressure every morning and evening, 2 to 3 times each time with an interval of 1 to 2 minutes, and take the average value; measure home blood pressure continuously for 7 days and take the average value of blood pressure for the last 6 days. If the blood pressure control is stable and up to standard, you can self-measure once or twice a week, once in the morning and once in the evening; preferably at a fixed time after waking up in the morning, before taking antihypertensive medication and breakfast. Record in detail the date and time of each blood pressure measurement and all blood pressure readings, not just the average.