What is the meaning of smog disease in cerebrovascular disease? Smog is a chronic progressive cerebrovascular disease of unknown etiology. It is called smog because when a patient undergoes cerebral angiography, many small dense piles of blood vessels appear at the base of the skull, resembling the smoke exhaled during smoking. As a rare disease, the incidence of smog is relatively low, and some patients have almost no symptoms at the beginning of the disease and are only detected and diagnosed when they are examined in the hospital. Therefore, it is important to pay attention to smog as early as possible, and as soon as it is diagnosed, we need to seek prompt medical attention. Although smog is an uncommon disease, it can be extremely harmful to patients once they suffer from it. The greatest harm is mainly reflected in two aspects, one is the narrowing and occlusion of the main cerebral arteries, resulting in insufficient blood supply to the brain, causing some symptoms of ischemia, such as dizziness and headache, numbness and weakness of the limbs, some visual impairment, unclear language, etc. On the other hand, the smoke-like vessels formed at the base of the skull, with very thin and fragile walls, may rupture at any time, causing the risk of cerebral hemorrhage, so once found and clearly If the diagnosis of smog is made, it must be treated promptly. Conservative treatment is mainly through medication to alleviate the further development of the disease, but medical experts have found that medication is almost ineffective in treating smog, so currently the effective treatment for smog is surgery. The surgical treatment of smog is not to restore the anatomy of the brain blood vessels to normal, but to build another blood channel for the patient. The combined vascular bypass surgery, which is now widely performed, can establish sufficient blood channels for the brain from both the main cerebral artery and the skull base vascular network, which can meet the blood supply needs of the brain to a greater extent and greatly reduce the probability of cerebral infarction and cerebral hemorrhage.