In recent years, smog has become a frequent occurrence in people’s lives, and more and more patients are paying more attention to this disease and gaining a better understanding of it. Simply put, when a doctor performs a whole-brain angiogram, it is defined as a smog disease when the pattern is very similar to smoke. It can cause cerebral ischemia or cerebral hemorrhage, and the effective treatment is currently surgical. So, what are the chances of bleeding without surgery and is the mortality rate high? Smoke disease has a high mortality rate. Smoke disease has a high disability and mortality rate, because the patient’s blood vessels are thin and weak at the site of stenosis or blockage, so if surgery is not performed in time, the chance of sudden cerebral hemorrhage is very high. Therefore, it is important not to be careless about smog, and after a clear diagnosis, surgery is recommended to solve the problem of blood flow blockage as soon as possible. There are three types of smog surgery, namely traditional bypass surgery, patching surgery and combined vascular bypass surgery. Combined vascular bypass surgery, however, has been clinically applied with more satisfactory results.