Cavernous cerebral infarction occurring on the left side of the brainstem is divided into two cases: symptomatic cavernous cerebral infarction must be actively treated to avoid progression of the disease, and asymptomatic cavernous cerebral infarction should be regularly reviewed, risk factors should be controlled, and a healthy lifestyle should be maintained. 1. Symptomatic lacunar cerebral infarction: if there are symptoms of neurological deficits such as dizziness, limb weakness, sensory abnormalities, etc., intravenous thrombolysis can be performed in the acute stage within the thrombolysis time window, and the rest of the treatment is carried out in accordance with the secondary prevention of ischemic stroke, and antiplatelet drugs (e.g., aspirin, clopidogrel, etc.), lipid-lowering drugs (e.g., atorvastatin, risculetin, etc.) are taken under the direction of the physician, while antihypertensive drugs (levothyroxine, clopidogrel, etc.) are administered. Antihypertensive drugs (levamlodipine, irbesartan, etc.) to control blood pressure, hypoglycemic drugs (e.g., metformin, etc.) to control the corresponding risk factors. 2. Asymptomatic lacunar cerebral infarction: if asymptomatic, regular review of head MRI, control of blood pressure, blood glucose, lipids and other risk factors, and the use of antiplatelet agents as appropriate under the guidance of a doctor if necessary. Patients with brainstem lacunar infarction need to maintain a healthy lifestyle, promote moderate sodium intake, eat less high-fat food, eat more fresh vegetables and fruits, increase physical activity, maintain a relaxed mood, and reduce mental stress. Drugs need to be standardized under the guidance of a doctor, such as changes in condition, timely hospital consultation.