Lateral paraventricular and hemizygous lacunar infarction is a type of cerebral infarction, which usually occurs due to blockage of the deep micro arteries of the brain, which in turn causes ischemia of the brain tissue. It may be caused by atherosclerosis due to high blood pressure and dyslipidemia. Lateral paraventricular and semiovoid lacunar cerebral infarction is diagnosed by cranial MRI or CT, and its clinical symptoms are usually not obvious, often manifesting as mild dizziness, headache, etc. The treatment is the same as that for conventional cerebral infarction. The prognosis of paraventricular and semiovoid lacunar cerebral infarction is generally better after active treatment. However, there is a probability of recurrence, so patients should pay attention to a light diet, avoid greasy, change bad habits, quit smoking and drinking. When the suspicion of lacunar cerebral infarction occurs, it is necessary to consult a doctor in time and complete the relevant examinations, and carry out standardized treatment under the guidance of the doctor.