Self-measurement is the measurement of blood pressure at home or in another environment. Self-measured blood pressure has the following 6 major implications: 1) Distinguish between persistent and “white coat” hypertension. Self-measured blood pressure values at home should not exceed 135/85 mm Hg. 2. To assess the efficacy of anti-hypertensive drugs. 3.Improve patient compliance with treatment. 4.May reduce the cost of treatment. 5.Self-measurement of blood pressure has the flexibility of time. For example, the blood pressure of some patients with hypertension is mostly elevated at 5-6 or 19-20 o’clock, and it is easy to miss the diagnosis by relying on occasional blood pressure measurement in the clinic, while self-measurement of blood pressure is easy to detect this part of patients. 6, can be regularly observed. At any time to understand the changes in blood pressure during treatment, to provide more complete information for diagnosis and treatment. The specific method of self-testing blood pressure is basically the same as occasional blood pressure measurement in the clinic. Mercury column sphygmomanometer can be used, but must be trained Koch sound auscultation method. The use of an upper-arm fully or semi-automatic electronic sphygmomanometer that meets international standards is generally recommended. Wrist- and finger-held electronic sphygmomanometers are not recommended. Self-measured blood pressure is also recorded as the average of 2 readings, along with the date, time, place, and activity of the measurement. In general, self-measured blood pressure values are lower than clinic blood pressure values. There is no uniform normal value for self-measured blood pressure, and 135/85 mm Hg is recommended as the upper limit of normal reference value. Home self-test blood pressure Be sure to rest quietly for at least 5 minutes to measure blood pressure, then is the upper arm exposed, cold in winter to take off the sweater, wear a single coat can also be, the cuffs tied the appropriate elasticity. Take a sitting position, keep quiet, limbs can not move, used to operate with the right hand, the right hand a button blood pressure measurement switch, the measurement value will come out, stop a minute and then the next blood pressure measurement, generally will be measured three times, the interval of one minute.