Hypertension is a relatively common cardiovascular dysfunctional disease, often accompanied by other organic diseases, such as kidney and heart disease, so it has caused widespread concern among the general public, and he is judged mainly when the systolic blood pressure is greater than 140mmHg and/or diastolic blood pressure is greater than 90mmHg, can be recognized as hypertension. The ideal blood pressure for adults is generally around 120mmHg diastolic pressure 80mmHg systolic pressure, mild hypertension range: 140~159mmHg systolic pressure, 90~99mmHg diastolic pressure, moderate hypertension range: 160~179mmHg systolic pressure, 100~109mmHg diastolic pressure, severe hypertension range: ≥180mmHg systolic pressure, ≥110mmHg diastolic pressure. The criteria of hypertension are also affected by other factors, infants and children with systolic blood pressure greater than 100 mmHg and diastolic blood pressure higher than 60 mmHg are hypertensive, children usually have systolic blood pressure higher than 110 mmHg and diastolic mmHg higher than 80 are hypertensive, however, environmental factors can also affect blood pressure, when the weather is hot, emotional irritability, or people When stimulated, blood pressure is high through strenuous exercise, pregnant women may develop gestational hypertension, and altitude can also affect blood pressure. In conclusion, the diagnostic criteria for hypertension are specific to the problem and not set in stone. It is not sensible to blindly diagnose and blindly take antihypertensive drugs.