A blood pressure of 150/100mmHg is considered secondary hypertension. Secondary hypertension is defined as a systolic blood pressure greater than 160mmHg and less than 180mmHg, or a diastolic blood pressure greater than 100mmHg and less than 110mmHg, as long as one of the criteria is met. Grade 1 hypertension is defined as 140-160mmHg and 90-100mmHg, while grade 3 hypertension is greater than 180/110mmHg. Generally, after the first diagnosis of grade 2 hypertension, antihypertensive drug therapy can be initiated, and antihypertensive drugs can be chosen from calcium channel antagonists, ARB class and ACEI class, while patients should pay attention to lifestyle improvement, such as weight loss, weight control, smoking cessation and alcohol restriction. Patients should also pay attention to lifestyle improvement, such as weight loss, weight control, smoking cessation, alcohol restriction, etc., as well as a low-salt, low-fat diet.