The normal value of essential hypertension does not have an accurate value, as long as the systolic blood pressure is between 120–139mmHg and diastolic blood pressure is between 80–89mmHg is the normal high value of the blood pressure, beyond this range indicates hypertension. Under normal circumstances, the body’s blood pressure systolic blood pressure between 90 ~ 140mmHg, diastolic blood pressure in the 60 ~ 90mmHg, if the blood pressure measured at different times of the systolic blood pressure are greater than or equal to 140mmHg, and diastolic blood pressure is greater than or equal to 90mmHg, then basically can be diagnosed as high blood pressure. Depending on the level of blood pressure, essential hypertension can be categorized into three levels, where Grade 1 hypertension refers to a systolic blood pressure of 140-159mmHg and a diastolic blood pressure of 90-99mmHg, Grade 2 hypertension refers to a systolic blood pressure of between 160-179mmHg and a diastolic blood pressure of between 100-109mmHg, and Grade 3 hypertension refers to a systolic blood pressure of ≥ 180 mmHg and diastolic blood pressure ≥ 110 mmHg. The occurrence of essential hypertension is related to daily bad habits, such as big fish and meat, smoking, drinking, etc. Therefore, patients should correct bad dietary habits in time, quit smoking and drinking, and do outdoor exercise appropriately, so as to let the blood pressure return to normal.