Patients with hypertension need to have their blood pressure measured regularly. During the period of uncontrolled hypertension and during medication changes, it should be measured once a day. After the blood pressure has gradually stabilized, it should be measured once a week. After taking antihypertensive medication daily, blood pressure should be measured 1-2 times a month. Non-hypertensive middle-aged and elderly people should have their blood pressure measured 1-2 times a year for early detection of hypertension, because hypertension is a silent killer. The time to measure blood pressure at home: every day after waking up in the morning, after urinating and defecating, before eating, and making records is the best. Take joint measurements for a few days or weeks for comparison. Wrong comparison: It is wrong to compare the blood pressure measured in the morning with the blood pressure in the afternoon (or any other time of the day).