Reyes syndrome (RS) is an acute progressive encephalopathy, also known as encephalopathy with visceral fatty degeneration, Reye syndrome, viral encephalopathy syndrome, massive hepatic fatty degeneration-acute encephalopathy syndrome, vomiting disease, hepatic lipidosis, etc. This syndrome is a syndrome of unknown etiology with acute encephalopathy and hepatic fatty degeneration as the main clinical features. It was first reported by Australian pediatric pathologist Reye et al. in 1963. Reye syndrome is a critical disease, which often presents encephalopathy symptoms such as acute intracranial pressure increase, impaired consciousness and convulsions after a prodromal viral infection. It is often accompanied by severe cerebral edema, abnormal liver function and metabolic disorders. Most cases die from severe intracranial pressure increase and brain herniation, or leave serious neurological sequelae.