Twenty years old belongs to the adult, adult blood pressure normal range, systolic blood pressure in 90 ~ 139mmHg normal, diastolic blood pressure in 60 ~ 89mmHg normal. When measuring blood pressure, in order to ensure the accuracy of the measurement, need to rest under the quiet for 5 to 10 minutes, and avoid emotional excitement, do not drink coffee or strong tea and other stimulating substances before the measurement, the normal systolic blood pressure range is less than 120mmHg, diastolic blood pressure range is less than 80mmHg. In the diagnosis of hypertension, it is not possible to rely solely on a single measurement of blood pressure, but generally three measurements a day can be used as a criterion for judgment. Although the age of twenty is not prone to hypertension, but still to develop a good lifestyle, avoid staying up late, avoid high oil and high fat food, usually do more physical exercise.