Most smoky patients have headache, nausea, aphasia, or physical impairment, and the doctor will arrange for a CT scan. It is recommended that patients undergo cerebral angiography, also known as DSA, to determine whether they have smog at all. DSA (Digital Subtraction Angiography) is a medical imaging technique that combines conventional angiography with computer technology. DSA allows a comprehensive view of the morphological structure of the blood vessels in the brain, as well as the degree of stenosis, and also allows the patient to see the abnormal growth of the small vascular network at the base of the skull. Smog is a rare cerebrovascular disease. The blood vessels in patients with smog are very different from those in the general population, and most patients have a cerebral angiogram in which the blood vessels look like smoke from a person’s cigarette, hence the name. Nowadays, with the popularization of medical imaging, the incidence of smog is increasing and a series of problems have followed, such as cerebral ischemia, cerebral infarction, cerebral hemorrhage, and seizures, etc. In fact, these conditions can be effectively improved by surgery. Combined vascular bypass surgery for smog is widely acclaimed by patients. The procedure is a combination of direct bypass + patching not only realizes rapid improvement of local blood supply to the brain, but also improves blood supply on a larger scale with excellent results, which pushes the treatment of smog to a new stage. Many patients have significantly improved their cerebral ischemic symptoms and greatly reduced their chances of rebleeding after receiving this procedure.