When it comes to smog, people who don’t know much about it may literally interpret it as a lung disease caused by smoking or something. But it is not. It is a rare cerebrovascular disease that appears to be indistinct, but is in fact exceptionally dangerous. Smoke disease is due to narrowing or occlusion of the main arteries of the brain, which then triggers an abnormal proliferation of the vascular network at the base of the skull, forming a network of tiny, fragile blood vessels, which is called smoke vessels. Once you have smog, you should go to the hospital for treatment in a timely manner. Some people ask if smog is life threatening if left untreated. Yes, it can be life-threatening if left untreated. The narrowing and occlusion of the main blood vessels in the brain can cause ischemia in the brain, which can lead to cerebral infarction, and cerebral infarction is very dangerous and can be life-threatening. Therefore, if you have smog, you should not take any chances, and you should seek treatment in time. For the treatment of smog, it is generally accepted that once the diagnosis is made, surgery should be performed in a timely manner, because ordinary conservative medical treatment is not very useful and can only relieve the symptoms in the early stage, but has poor results in the later stage. Therefore, surgery is the only way to treat smog. Currently, combined vascular bypass surgery is a very effective surgical procedure for smog, which combines the advantages of direct vascular bypass and patching and completes both procedures together in the same surgery, which also overcomes their respective disadvantages and can achieve a more ideal blood supply improvement.