Hypertensive crisis is a relatively urgent medical condition in clinical settings. Its diagnostic criterion is a diastolic pressure greater than 130 mmHg. Naturally, the higher the blood pressure, the greater the threat. A hypertensive crisis can lead to many clinical symptoms, such as acute left heart failure, dizziness, headache, cerebral hemorrhage, and acute renal failure. The most common causes of hypertensive crisis are primary or secondary hypertension, which, under certain specific circumstances, lead to uncontrollably high blood pressure and related clinical symptoms. The focus of treatment is on controlling the blood pressure and choosing different treatment plans for complications. For instance, in the case of heart failure, vasodilators and diuretics may be used for symptomatic treatment.