Luminal infarction, or lacunar infarction, also known as lacunar infarction, is a small penetrating artery in the deep cerebral hemisphere or brainstem that has a lesion in the vessel wall based on long-term hypertension, resulting in occlusion of the lumen and the formation of a small infarct focus. Because of the limited blood supply range of deep penetrating arteries, the blockage of a single one causes ischemic necrosis in only a small area of brain tissue, which forms the so-called lumen. Because the lacunae are small, they sometimes affect only motor or sensory areas of the brain and result in pure motor hemiparesis, or only hemianesthesia without hemiparesis. However, not all lacunae that occur produce symptoms; only those that involve important neural pathways or neural structures will manifest, or they can otherwise be asymptomatic. Simply put: a lacunar infarct is a small brain infarct, but only lacunar infarcts occurring in important functional brain areas will cause severe clinical symptoms; lacunar infarcts occurring in non-important functional areas may be asymptomatic or have mild symptoms. In the two images above, there is a clear difference in the location and extent of lacunar infarcts, resulting in very different clinical symptoms. In most cases, lacunar infarction is not a serious disease, but sometimes the opposite is true. Neurologists often see a patient with a small lacunar infarct on a brain CT, but further examination of his intracerebral and cervical vessels reveals that one of the main trunks of the cerebral artery has narrowed to the point of occlusion! This is what is often referred to as a “small problem, big trouble”. If such a lacunar infarction does not undergo strong treatment and remains at ease, a storm will soon come. It is undeniable that “cavity infarction” has now become a waste basket, and many diseases that are difficult to diagnose and differentiate can be applied to this diagnosis. Many symptoms such as dizziness, headache, unsteady walking, memory loss, drooling …… can be diagnosed as “cavity infarction”. Is a cavernous infarction the cause of these symptoms? Not necessarily. They can be symptoms of Meniere’s disease, benign positional vertigo, migraines, aneurysms, Alzheimer’s disease, Parkinson’s disease, depression ……. It is only by listening to the complaints and treating them carefully that we can make a pertinent judgment about the actual condition of these symptoms and get better treatment. Therefore, does cavernous infarction matter or not? The answer is: it varies from person to person. It is important to be evaluated by a neurologist so that a more reliable conclusion can be reached.