The impact of encephalitis on the child and the trauma it brings to the whole family is tremendous, and most of them are accompanied by changes in the composition of the cerebrospinal fluid, and the time of onset varies. The chances of sequelae are very high for children who are late to the doctor, have frequent convulsions or are in a coma for a long time, and often have neurological or psychiatric sequelae due to brain damage. For children with encephalitis caused by special viruses, such as Eastern equine encephalitis, the possibility of sequelae is also very high and the prognosis is poor. The younger the child, the greater the likelihood of sequelae. For children with herpes simplex encephalitis, the sequelae are not only the sequelae, but there is a 30% mortality rate. In surviving children with herpes encephalitis, the sequelae are mainly paralysis and motor limitations. It is important to detect and treat the disease as early as possible to minimize the onset of sequelae of encephalitis. It is really too late to regret when the sequelae appear. The symptoms are different for each child, so it is important to find the abnormalities and go to the hospital early.