Wrist sphygmomanometer is also more accurate, wrist sphygmomanometer is a kind of electronic sphygmomanometer, electronic sphygmomanometer is divided into wrist type electronic sphygmomanometer and cuff type electronic sphygmomanometer, compared with cuff type sphygmomanometer, wrist type sphygmomanometer is not more accurate than cuff type sphygmomanometer, wrist type electronic sphygmomanometer is very convenient to apply. As a home use electronic blood pressure monitor is more and more widely used, but as a doctor’s recommendation, the cuff type electronic blood pressure monitor is preferred. Patients with high blood pressure are advised to take their blood pressure at least twice a day, namely in the morning before waking up and in the afternoon at 3-4 o’clock. If there are symptoms of dizziness at any time to take blood pressure, before applying the electronic blood pressure monitor, it is recommended to calibrate the electronic blood pressure monitor with the hospital blood pressure monitor, so as to avoid the inaccurate value of the blood pressure monitor to miss the disease.