Dizziness that occurs daily after 4:00 p.m. may be caused by elevated blood pressure. Blood pressure should be monitored continuously for 3-5 days, and if it is elevated, blood pressure-lowering medication is generally recommended. Clinically used drugs mainly include nifedipine controlled-release tablets, nifedipine extended-release tablets, amlodipine, amlodipine benzoate, valsartan and irbesartan, and enalapril can also be applied. Clinically, the main application of long-acting preparations is generally used to make the patient’s blood pressure stable and should not be high or low. Human blood pressure generally has two peaks, mainly occurring between 8:00-10:00 am and 4:00-6:00 pm. When blood pressure is elevated or unstable for a long period of time, it is easy to damage the intima, noting that the tangible fraction of the blood gathers in the intima of the heart, which can cause stiffening of the walls and narrowing of the lumen, leading to atherosclerosis, the main cause of cerebral infarction. In addition, cerebral hemorrhage is also easily caused by severe hypertension, and both cerebral hemorrhage and cerebral infarction are acute cerebrovascular diseases with high disability and mortality rates, which seriously affect the quality of life of patients.