Patients who have a sudden increase in blood pressure within a short period of time can cause hypertensive crisis. The adverse consequences of hypertensive crisis are as follows: 1. Hypertensive encephalopathy will occur, and patients will have symptoms of increased intracranial pressure, such as severe dizziness, headache, blurred vision, blurred vision, double vision, sudden blackness in front of the eyes, sudden collapse, accompanied by transient loss of consciousness, and severe nausea and vomiting, which cannot be relieved by antiemetic drugs. 2. The sudden increase in blood pressure also increases the load on the heart, which can lead to chest tightness, shortness of breath, palpitations, precordial discomfort, chest pain and other symptoms, and can aggravate unstable angina pectoris in patients with a history of coronary artery disease. 3.