The incidence of smog is relatively low, and it is considered a relatively rare disease that many people may not have heard of, and even some local health workers know little about it. When most patients hear that they have smog, they are often at a loss as to what it is and how to treat it. In fact, smog is a cerebrovascular disease, due to chronic progressive stenosis or occlusion of the main blood vessels in the cerebral artery ring, secondary to the formation of abnormal vascular network like smoke at the base of the skull, which can cause cerebral ischemia, cerebral infarction, cerebral hemorrhage, seizures, etc. Serious cerebral infarction and cerebral hemorrhage can be life-threatening, so once smog is clearly diagnosed, it is recommended to undergo surgery in a timely manner. Some patients ask how long does it take to return to normal after craniotomy for smog? It is true that craniotomy is needed to treat smog, and the most advanced and effective surgical procedure is combined vascular bypass surgery. Unlike the traditional direct bypass surgery or patching surgery, combined vascular bypass surgery is an advanced and improved composite procedure, which combines direct vascular bypass and patching in the same surgery to rapidly improve the blood supply to the brain, and at the same time, apply multi-factor patching to the brain surface to induce the formation of new blood vessels to further expand the scope of blood supply improvement and complete better blood flow reconstruction to achieve better treatment results. Reconstruction, to achieve better treatment results. How long does it take to return to a normal person with craniotomy for smog like this? Although combined vascular bypass surgery for smog is a craniotomy, the technique is very mature and safe. In addition, the combined vascular bypass surgery itself does not cause too much damage to the patient, and the recovery from the surgery is very fast, usually one to two weeks after the surgery, you can be discharged from the hospital.