The causes of a sudden rise in blood pressure to 235/130 mmHg can be divided into physiologic and pathologic causes. Physiologic causes can be recovered after restoration of a quiet state, while pathologic causes require further clinical diagnosis. Physiologic causes are related to emotional stress, excessive exercise, etc. Pathologic causes are more complex. Pathologic causes are more complex and are clinically referred to as hypertensive emergencies. The primary diseases of hypertensive emergencies can be broadly categorized into vascular diseases, clinical crises and so on. 1. Vascular diseases: cerebrovascular diseases such as cerebral infarction, intracranial hemorrhage, etc., and cardiovascular diseases such as acute coronary syndrome, aortic coarctation, etc. 2. Clinical crisis: common collagen vascular disease caused by renal crisis, hyperthyroidism crisis, pheochromocytoma crisis. 3. Others: eclampsia, perioperative severe hypertension and so on. When the blood pressure rises to 235/130mmHg and does not fall or continues to rise, it is necessary to consult a doctor in time and lower the blood pressure in a controlled manner under the doctor’s guidance.