If a young child has encephalitis, the following clinical symptoms may occur: a. Brain symptoms. Children with encephalitis often sleep and have a very poor mental state, and even older children may have headaches and vomiting, mainly due to nerve damage in the central nervous system and increased intracranial pressure. Secondly, fever can occur if the child has viral encephalitis or septic meningitis. Sometimes the fever is very high, and sometimes the temperature is not particularly high. Third, children may also have other symptoms, such as convulsions. Because encephalitis in children can cause neuropathy in the brain, which can lead to convulsions, a positive Pap stain can be seen during a neurological examination of the child. In children with encephalitis, anti-infection treatment and cranial pressure lowering treatment are required.