Under normal circumstances, grade 2 hypertension or grade 1 hypertension does not cause significant headache and head swelling. However, if the hypertension is grade 3 or higher, malignant hypertension or hypertensive crisis occurs, which in severe cases leads to hypertensive encephalopathy and triggers increased intracranial pressure, the patient will have obvious dizziness and headache, accompanied by severe nausea and jet-like vomiting, and the patient will not improve significantly with the application of conventional antiemetics. In severe cases, patients may experience acute cerebrovascular complications, such as blurred vision, blurred vision, sudden collapse, and even transient loss of consciousness. Therefore, once a patient with hypertension has a sudden increase in blood pressure and has obvious symptoms of dizziness, headache, and head swelling, he or she must quickly go to the hospital for consultation and choose a slow, continuous, and smooth way to lower blood pressure after completing relevant tests.