Dizziness may be caused by high blood pressure. First, measure the blood pressure. If the systolic pressure is greater than 140 mm Hg and the diastolic pressure is greater than 90 mm Hg, it is clinically called hypertension. In severe cases, patients may also have headache, nausea, vomiting, which can cause hypertension, cardio cerebral disease patients to have consciousness disorders. If the systolic blood pressure is greater than 140 mm Hg and the diastolic blood pressure is greater than 90 mm Hg, it is called hypertension and should be actively regulated. The commonly used long-acting drugs are amlodipine, irbesartan and candesartan, so as to keep the blood pressure as stable as possible, instead of being high or low. If the patient has cerebral blood supply insufficiency, it can also occur, mostly in middle-aged and elderly people, and most of them have cerebral atherosclerosis. If it is young people who have been stressed for a long time, and lack of sleep for a long time, it can also be caused.