Is there a proofreading place for diving sphygmomanometer in Tianjin? I just bought one, and the measured data is higher than others.

Generally, there are two reasons for measuring sphygmomanometer: 1. The measurement posture is wrong, and the armband is tied too tightly. The armband is the same height as the heart, so a finger position is reserved. 2. Generally, the measurement at home is about10mmhg lower than that at the hospital. Some time ago, I also bought my father a sphygmomanometer, 365, my remote intelligent sphygmomanometer, with good accuracy and voice broadcast function.