When you first hear the name, many people may think that it is a disease caused by long-term smoking. The name is derived from the fact that when a cerebral angiogram is performed, the image of the cerebral vessels looks like the smoke from a cigarette. In smog, the main arteries of the brain become chronically narrowed, which causes abnormal growth of the vascular network at the base of the skull, forming a network of tiny blood vessels that resemble smoke. Therefore, smog can cause cerebral ischemia, cerebral hemorrhage and other symptoms, especially the occurrence of common problems such as cerebral infarction, which is also related to smog. If smog is not treated in time, it may lead to great harm, and some patients also show seizures, and if it causes acute brain hemorrhage or acute cerebral infarction, it may even be life-threatening, so it must be treated as early as possible. At present, some local primary care hospitals treat smog in a conservative way, with the help of drugs to relieve the disease, but can not cure the root, and long-term use of such drugs is also damaging to human organ function. As a result, surgery is preferred in the treatment of smog. To cure smog, it is better to use the more advanced combined vascular bypass surgery. It is different from the traditional surgical method, which successfully combines bypass and patching in the same surgery, and further expands the patching factor, which can build a new blood flow channel and restore the blood supply to the brain, and the treatment effect is highly affirmed.