Lower blood pressure may be caused by factors such as not being in a calm state before measurement, incorrect measurement methods, or the effect of multiple measurements on blood vessels. 1. Before measuring blood pressure, it is necessary to rest for a while so that the body is in a calm state, so that the measurement will be accurate. If the blood pressure is measured just after a strenuous exercise, it will be on the high side, and when it is measured again, it will be lower than the first measurement. 2. Incorrect measurement: There is an operation standard for measuring blood pressure, and failure to follow the requirements may cause the measurement to be lower than the first one. 3. Pressure on blood vessels from multiple measurements: Measuring blood pressure through the cuff exerts pressure on the blood vessels, which causes them to contract. Frequent measurements will increase the contraction of the blood vessels, resulting in a lower value than the first measurement. If your blood pressure is lower than the previous measurement, don’t panic, take a break and measure again, look for the cause and consult a doctor if necessary.