Lacunar stroke occurs when the small arteries within our brain undergo pathological changes due to long-term high blood pressure, leading to occlusion of the vessel lumen and consequently forming small stroke lesions. Generally, patients may exhibit symptoms, but these symptoms are usually mild. However, some patients are diagnosed during physical examinations. Regardless of the case, the prognosis is good, and lacunar stroke does not pose a life-threatening risk. Nevertheless, once a lacunar stroke occurs, it is essential to further investigate the condition of the blood vessels and check for risk factors such as high blood pressure and diabetes. Based on the situation, secondary prevention should be carried out to prevent another stroke.