A 6-year-old child had a sudden onset of numbness and weakness in his right arm and leg two months ago, which lasted for a few minutes and relieved itself. After several episodes of this kind, a thorough examination was done and he was diagnosed with smog. Do I need surgery? The numbness and weakness of the patient’s right arm and right leg is a manifestation of transient cerebral ischemia. Smog is a progressive disease mainly manifested by gradual narrowing or occlusion of the aorta of the brain. If surgical intervention is not actively performed, smog will generally develop and worsen gradually, and cerebral infarction or cerebral hemorrhage may occur again at any time, and severe cerebral infarction or cerebral hemorrhage can be disabling or even fatal. For smog, conservative medical treatment is generally not significant because smog is commonly known as a vascular malformation, and drugs are unlikely to change or correct this vascular malformation. It is possible to reconstruct a good vascular channel through surgery for therapeutic purposes, and currently combined vascular bypass surgery is a relatively advanced and safe surgical procedure. In this case, it is recommended to take the child to the hospital for an interview.