Smog was once thought to be a rare disease that many people had never heard of. However, in recent years, with the development of imaging technology, smoker’s disease has gradually become more familiar to more people. Smoker’s disease is a narrowing and occlusion of the cerebral blood vessels, followed by malformation of the vascular network at the base of the brain, which can easily cause cerebral infarction and cerebral hemorrhage. Once a clear diagnosis of smog is made, surgery is required as soon as possible, as a large number of medical practices have proven that conservative medical treatments for smog are basically unhelpful. When it comes to surgery, some patients ask whether there will be sequelae of smog surgery. In fact, on the contrary, a series of sequelae may occur if smog is not treated surgically, and it is precisely these sequelae that smog surgery prevents or, to some extent, ameliorates. Smog can lead to headache, dizziness, weakness of limbs, loss of vision, memory loss, epilepsy, hemiplegia, aphasia and other sequelae, and sometimes the acute onset may even be life-threatening. Therefore, patients with smog should undergo surgery as soon as possible. Combined vascular bypass surgery is currently a very advanced and effective surgical procedure for the treatment of smog, which not only does not produce the sequelae of smog surgery, but in most cases can improve some of the preoperative sequelae of smog. Most patients with preoperative symptoms such as headache and dizziness, limb weakness, visual deficits, slurred speech, aphasia, etc., can be greatly improved after the surgery, and the main thing is to prevent the occurrence of further adverse symptoms.