Hypertension suddenly low blood pressure and dizziness may be caused by irrational antihypertensive treatment program, myocardial infarction, acute blood loss, etc., which can be treated by adjusting the antihypertensive medication regimen as prescribed by the doctor, taking oral aspirin, and replenishing blood volume. 1. Unreasonable antihypertensive treatment program: excessive dosage of antihypertensive drugs or taking multiple antihypertensive drugs leads to too rapid a drop in blood pressure or a drop in blood pressure below 90/60 mmHg, which is prone to insufficient blood supply to the brain and triggers dizziness. Adjust the usage and dosage of antihypertensive drugs as prescribed by the doctor and closely monitor the blood pressure status after adjusting the drugs. 2. Myocardial infarction: After myocardial infarction, the blood pressure of hypertensive patients suddenly becomes low due to the decreased pumping function of the heart, causing insufficient blood supply to the brain and dizziness. Patients with myocardial infarction should use aspirin, heparin, urokinase and other medications and interventional therapy in time to open the occluded coronary artery in time, so that the myocardium can be reperfused to reduce the degree of infarction and narrow the scope of infarction. 3. Acute blood loss: when acute hemorrhage occurs in digestive tract or urinary tract, blood volume decreases sharply and blood vessels can not be filled, which leads to sudden low blood pressure and dizziness caused by hypertension, and should be treated with hemostatic therapy in time, and at the same time, blood volume can be supplemented through blood transfusion and rehydration to make blood pressure recovered in time. Hypertension suddenly low blood pressure, and dizziness should go to the hospital in time to improve the examination, and give targeted treatment after the cause of the disease is clear.