A high pressure of 170mmHg and a low pressure of 120mmHg is a severe case of high blood pressure, which is classified as Grade 3 hypertension and is relatively dangerous. Hypertension is a relatively common systemic vascular disease that refers to high blood pressure in the arteries. Hypertension is associated with genetic factors, mental factors, and lifestyle and dietary habits. Common symptoms include dizziness, headache, fatigue, and palpitations (rapid heartbeat, often accompanied by panic). Maintaining high blood pressure for a long period of time has a higher chance of causing cardiovascular and cerebrovascular diseases, and in serious cases, it may lead to cerebral hemorrhage, which has a very high disability rate. Hypertension is an important risk factor for cerebral hemorrhagic infarction, and the vast majority of patients with cerebral hemorrhagic infarction have underlying hypertension. Other secondary hypertension, after correcting the primary disease, the blood pressure can be restored. It should be noted that the reactive hypertension caused by cerebral ischemic infarction should not be lowered easily, so as not to cause the insufficiency of cerebral irrigation. Primary hypertension can be treated with antihypertensive drugs under doctor’s guidance, such as nifedipine and irbesartan, etc. Tertiary hypertension should be treated with combination therapy, and the process of lowering blood pressure should be gradual and steady to avoid causing shock and other serious reactions. Some secondary hypertension can be controlled by surgical treatment. Hypertensive patients should pay attention to eat a light diet, appropriate exercise, and maintain good work and rest habits. Seek medical attention when uncomfortable symptoms occur.