The blood pressure of a normal person may be different in different situations, different mental conditions and different postures during the day. Therefore, the following points should be noted when measuring blood pressure: 1. Before measuring blood pressure, sit quietly for a few moments to quiet your spirit. 2. Do not measure blood pressure immediately after emotional stress and excitement. 3. Do not measure blood pressure immediately after strenuous exercise or labor. 4.Sit upright when measuring, take off the sleeve of one side of your shirt, do not roll up the tight sleeve, put your arm flat, palm up, upper arm and heart at the same level, and relax your muscles. If it is horizontal, also make the upper arm and the heart at the same level, not too high or too low. 5, do not be nervous when measuring blood pressure, do not hold your breath, because holding your breath can make blood pressure rise. 6, cold environment can make blood pressure high; high heat environment can make blood pressure low, which should also be noted.