Brainstem lacunar foci refer to lacunar cerebral infarction in the brainstem area, which is due to tiny cerebral infarcts formed in the small deep penetrating arteries of the brainstem due to ischemia and occlusion, which are very small and may be punctate in size. The cause of lacunar cerebral infarction formation is related to the patient’s long-term hypertension, hyperglycemia, atherosclerosis, or microembolism formation. Patients may show symptoms such as mild dizziness, headache or numbness of the limbs and mild weakness of the limbs. It is recommended that patients should usually make adjustments from their own lifestyle and must have a low-salt and low-fat diet to avoid aggravating cerebral atherosclerosis. It is recommended to initiate secondary prevention of cerebrovascular disease according to the severity and take oral bye aspirin against platelet aggregation to prevent the occurrence of lacunar cerebral infarction.