This value is usually considered normal, but the following points need to be noted: 1. The measurement method, whether the left or right arm was measured, and whether both lower extremities were also measured. In addition, whether the measurement is taken standing, sitting or lying down, and whether the sleeve is worn loosely is relevant to the detection of blood pressure values. 2. The time of measurement, some patients have high blood pressure in the morning, high blood pressure in the afternoon or high blood pressure at night. Is the time of measurement just at the trough of blood pressure. In addition, blood pressure fluctuates, systolic blood pressure normally fluctuates around 30mmHg, diastolic blood pressure normally fluctuates around 15-20mmHg. 3, to determine whether the blood pressure is normal, it is best to do ambulatory blood pressure monitoring. You can measure the blood pressure for 24 hours and see if the blood pressure is normal by overall assessment.