Smog disease, also known as cerebral base abnormal vascular network disease (or moyamoya disease), is a specific type of cerebrovascular disease. The symptoms of smog disease are divided into two categories, hemorrhagic and ischemic. If adult patients are not treated in time, memory loss or even cerebral infarction and cerebral hemorrhage can occur, so if they do not receive proper treatment smog disease has a high disability and mortality rate, which seriously affects human life and quality of life. There are often several clinical types, 1, transient ischemic attack type: the clinical characteristics are repeated occurrence of monoplegia or force weakness, mostly hemiplegia, both left and right alternating hemiplegia or bilateral hemiplegia. 2.Acute cerebral infarction type: manifested as persistent paralysis, aphasia, visual impairment and mental retardation. 3.Epileptic type: characterized by frequent seizures, partial seizures or seizure continuity with EEG epileptiform discharges. 4. Hemorrhagic type: subarachnoid hemorrhage or brain parenchymal hemorrhage. Adult patients are more likely to develop this type than pediatric patients. After getting smoke disease, most of the clinical treatment is combined with vascular bypass surgery, and more than 90% of patients can have significant improvement of symptoms and good recovery after surgery. In conclusion, having smog disease can cause cerebral infarction if left untreated, leading to hemiplegia, aphasia, headache, epilepsy and memory loss. If you have a suspicious patient, you should be advised to go to the hospital for timely examination and treatment.