The blood pressure of patients with cerebral infarction can be elevated, lowered, or normal.1 Some patients usually have hypertensive disorders, and when the blood pressure suddenly drops too low it is easy to induce cerebral infarction in patients, causing them to develop a watershed-area cerebral infarction. Because the patient’s blood pressure drops too low will lead to inadequate perfusion of the brain, causing the patient to develop a watershed area cerebral infarction. During the acute phase of cerebral infarction, blood pressure is not strictly controlled, with high pressure at 150-160 mmHg and low pressure at 60-90 mmHg. 2. If the patient’s blood pressure drops too low, it is easy to aggravate the patient’s cerebral infarction symptoms, and during the acute phase of cerebral infarction, never give the patient oral nifedipine and other fast-acting antihypertensive drugs, and lower the blood pressure to smoothly take long-acting oral antihypertensive drugs, so that the blood pressure is stable and slowly The blood pressure should be lowered smoothly and slowly with long-acting oral antihypertensive drugs.