It is recommended to measure blood pressure after resting for 5~10 minutes, in a sitting position or lying down, with a mercury sphygmomanometer or an electronic sphygmomanometer. Before taking the blood pressure measurement, do not drink stimulating beverages such as coffee or strong tea, rest for 5~10 minutes, sit with your arm on the table or lie down so that your elbow is at the same level as your heart. If you use a mercury sphygmomanometer to measure blood pressure, the cuff around the elbow nest on the 2 horizontal fingers tied, tight to be able to put in 1 finger appropriate, will be placed in the elbow nest of the stethoscope body piece of the brachial artery pulsation, to the airbag pressurization, until the brachial artery can not be heard to pulsation and then pressurized 20mmHg, and then slowly deflated, heard the first sound of the pulsation of the blood pressure for the systolic blood pressure, pulsation of the sound disappeared when the value of the blood pressure for the diastolic blood pressure. If you use an electronic sphygmomanometer, after tying the cuff as described above, you can press the button for pressure measurement and wait for the instrument to prompt the blood pressure value. In order to minimize the error, you can take another measurement after 1~2 minutes, and take the average value of the two measurements as the blood pressure value. If your blood pressure is abnormal, we recommend that you consult a doctor as soon as possible to avoid delaying your condition.