Smoggy disease, a name that seems to be very moving in terms of its name, is like smoke and fog, and it is easy to associate it with the smoke in the environment. In fact, it has nothing to do with haze, not smoke in the outside environment, but smoke in the human brain. As a disease with low incidence, some patients have no symptoms in the early stage and can only be detected when they go to the hospital after cerebral angiography. So, what are the signs and symptoms of smog during angiography? Cerebral angiography is the main means to diagnose smog. Generally, if a narrow and small network of blood vessels is found at the base of the skull and is in the shape of smoke, the diagnosis of smog can be confirmed. There are also a few patients with smog disease accompanied by the risk of cerebral hemorrhage, so treatment measures should be taken immediately for smog disease as soon as it is diagnosed. Since the 1950s and 1960s, many experts at home and abroad have been studying and exploring the treatment of smog, and after years of efforts, the medical profession has reached a consensus that drug treatment is basically of little significance for smog, and that surgery should be performed as soon as the diagnosis is clear. The current surgical treatment methods for smog disease include direct bypass surgery, patching and combined vascular bypass surgery, of which direct bypass surgery has limited blood supply and patching has the risk of stroke. At present, the combination of direct bypass and patching is a combination of direct bypass and patching, which further improves the disadvantages of the blood supply range of single bypass by multi-factor patching and realizes multi-faceted improvement of cerebral blood supply, while direct bypass effectively improves the problem of slow blood supply effect of traditional bypass and greatly reduces the risk of cerebral infarction, thus effectively treating smog.