Smog is a rare cerebrovascular disease in which narrowing or occlusion of the major arteries of the brain due to some congenital or acquired cause subsequently leads to the formation of an abnormal vascular network at the base of the skull. Therefore, smog disease is divided into congenital smog disease and acquired smog disease. Some scholars believe that the onset of smog is related to genetic factors, and clinically it has been found that the onset of smog has a certain family tendency, and the prevalence of the family members of smog patients is tens of times higher than that of the general population. Therefore, a significant proportion of smog is congenital. So a patient asks, do I need to have surgery for mild congenital smog? By mild here, I may mean that the symptoms are severe, not obvious, or not yet symptomatic. However, this is only temporary. Smog is a progressive disease, and if left untreated, as it progresses, smog can cause cerebral ischemia, cerebral infarction, cerebral hemorrhage, seizures, etc., which can lead to serious consequences and may even be life-threatening. Therefore, regardless of whether the disease is so-called mild or severe, congenital or acquired, smog disease should be surgically treated as soon as the disease is clearly diagnosed. Currently, combined vascular bypass surgery is an advanced and effective surgical procedure for the treatment of smog. Unlike the traditional direct bypass surgery or traditional patching surgery, combined vascular bypass surgery is a new type of composite surgery, which puts direct bypass and patching together in the same surgery, and has more patching factors, including temporal muscle, dura mater, cranial periosteum, middle meningeal artery, etc. Through multiple effects to reshape the perfect blood supply system, improve the brain blood supply to the greatest extent and restore the brain nerve health.