In order to have a healthy body, nowadays not only the elderly have a strong sense of health, even many young people also step into old age early. Despite all the precautions, there are still many diseases that come unexpectedly, including many rare diseases. Smoke disease is one of the rare diseases that can cause a variety of adverse effects on human health, such as insufficient blood supply to the brain, transient cerebral ischemia, cerebral infarction, and cerebral hemorrhage. Why is smog called smog? When you first hear about smog, many people are curious about its beautiful name. Smoky disease is also known as Moyamoya disease. It is mainly due to chronic progressive stenosis or occlusion of blood vessels in the main bilateral branches of the brain, resulting in a series of small vascular networks shaped like smoke in the side branches, so it is called smoky disease. Typical early symptoms of smog are mainly dizziness, headache, nausea, and possibly varying degrees of mental retardation. In some patients with smog, the growth of the compensatory vessels is faster than the occlusion of large blood vessels, and the patient has sufficient blood supply to the brain without symptoms and can pass through life safely, but this is relatively rare. Most patients with smog have a slower growth rate of compensatory vessels than the occlusion of large blood vessels, and have insufficient blood supply to the brain, with symptoms of transient cerebral ischemia and cerebral infarction. Repeated attacks of cerebral infarction or cerebral hemorrhage may be life-threatening. Thus, it is clear that smog is a serious hazard and treatment needs urgent attention. The treatment plan for smog disease has always been a major concern for patients and their families, and only with a clear understanding of the treatment method can the right choice be made. From the current treatment status, many local hospitals are not very good at taking a single bypass surgery or patching, these two methods due to the existence of some shortcomings of each, resulting in poor results. At this time, combined bypass surgery came into being, which is a combination of bypass and patching, which can effectively improve the patient’s blood supply to the brain and bring new hope to patients with ideal post-operative recovery.