Cavernous foci refer to the development of cavernous cerebral infarcts in the brainstem, which are tiny cerebral infarcts formed due to ischemia and occlusion of small deep perforating arteries in the brainstem, and are very small in size, and may be punctate in shape. The cause of lacunar cerebral infarction is related to long-term hypertension, hyperglycemia, atherosclerosis, or microembolism. Patients may show symptoms such as mild dizziness, headache or numbness of limbs and mild weakness of limbs. It is recommended that patients should adjust their lifestyles and take a low-salt, low-fat diet to avoid aggravating the degree of cerebral atherosclerosis, and it is recommended that secondary prevention of cerebrovascular disease should be initiated according to the degree of severity, and that oral anti-platelet aggregation of Bay Aspirin should be taken to prevent lacunar cerebral infarction from occurring.