Smog was first understood by medical professionals in various countries in the late 1960s, and most patients learned about it only after they developed symptoms and went to the hospital for a cerebral angiogram. So, what is smog, how does it affect people, and can it be cured? Definition of smog: Smog, defined as a rare disease in the medical field, is mainly due to the narrowing or occlusion of the main arteries of the brain, which leads to the formation of a smoke-like network of abnormal blood vessels at the base of the skull, and when these networks are examined by cerebral angiography, they appear like a cloud of smoke, so it is called smog. There are two peaks in the incidence of smog, the first in children under 10 years of age and the second in adults over 40 years of age, with significant family aggregation. The effects of smog on people: Most patients generally have nausea and vomiting initially, and others have further tests during hospital admission after an acute cerebral infarction, suggesting smog. Smog disease has a higher chance of triggering brain hemorrhage, which is a very dangerous situation for patients. If treated promptly, the possibility of recovery is still relatively high, but if the disease is allowed to develop at will, it can be disabling or fatal. Therefore, you should pay more attention to the changes in your body in daily life, and seek medical treatment as soon as possible when relevant symptoms appear. There are no effective drugs for the treatment of smog, and once diagnosed, surgery is recommended. Combined vascular bypass surgery has been widely used in clinical practice and has achieved good results.