For people diagnosed with hypertension for the first time, if the blood pressure exceeds 160/100mmHg, it is a more dangerous situation, and antihypertensive medication should be initiated immediately. If the patient’s blood pressure is usually well controlled and suddenly rises above 180/120mmHg it is a hypertensive emergency, which is a more dangerous situation. This kind of hypertensive emergency may lead to cerebral hemorrhage, subarachnoid hemorrhage, severe heart failure, renal insufficiency, etc., and requires immediate controlled blood pressure reduction. Generally, whenever hypertension reaches grade 3, it is a more dangerous state, and grade 2 or higher is relatively dangerous and requires immediate initiation of antihypertensive medication. For people with high blood pressure, it is important to keep it under control because if it is not well controlled, complications such as renal insufficiency and cardiac hypertrophy may occur in about 10 years.