Blood pressure 230/120mmHg has reached the diagnostic standard of severe hypertension, which may cause cerebrovascular disease, heart failure, aortic coarctation and many other hazards. 1. Cerebrovascular disease: cerebral arteriosclerosis in patients with severe hypertension, the elasticity of blood vessels decreases, easy to form aneurysms, when the blood pressure is too high, it is very easy to lead to the rupture of cerebral arteries or aneurysms, which may cause cerebral hemorrhage, cerebral infarction and so on. 2. Heart failure: when severe hypertension, the heart is overloaded, easily causing heart failure, chest tightness, dyspnea and other symptoms. 3. Aortic coarctation: If severe hypertension is not controlled in time, it may directly lead to aortic intima-media tear, forming aortic coarctation, and the mortality rate is very high if it is not treated in time. Therefore, when the blood pressure is 230/120, the patient should go to the hospital in time, under the guidance of the doctor for antihypertensive treatment, in order to avoid serious consequences.