The examination methods of hypertension are as follows: 1, clinic measurement: non-same day measurement more than two times, blood pressure are above normal value to be diagnosed as hypertension. Each measurement is taken three times and the average value is taken; 2. 24-hour ambulatory blood pressure monitoring: A 24-hour ambulatory blood pressure monitor is used to measure the blood pressure of the right upper limb. It automatically measures every half hour during the day and every half hour or hour at night, and is used to understand the fluctuation of blood pressure for 24 hours. It is more accurate compared to a single blood pressure measurement in the clinic and can reflect the changes in blood pressure during daily work, life and study.