For hypertension as long as it exceeds 140/90 mmHg is a diagnostic criterion for hypertension, but blood pressure above grade 2 hypertension, that is, greater than 160/100 mmHg is a stage of high blood pressure. For blood pressure over 160/100mmHg, immediate oral antihypertensive drug treatment is required, while people between 140/90mmHg and 160/100mmHg can choose to be treated with small doses of antihypertensive drugs applied on the basis of strict lifestyle control. In some cases, after weight loss, regular exercise and diet control, many people can reduce their mild blood pressure to normal without the need for oral medication. However, people with grade 2 or higher hypertension are in the higher range, and many people need oral antihypertensive drugs to bring their blood pressure down to normal.