Encephalitis in children is generally caused by viral infections, leading to inflammation that naturally results in symptoms like fever. Thus, fever is the most common symptom of pediatric encephalitis, with some body temperatures reaching extremely high levels, even above 40 degrees Celsius. Additionally, patients also experience significant headaches, nausea, and vomiting due to inflammation or increased intracranial pressure. Furthermore, patients often feel discomfort in the occipital and cervical regions, which is a sign of meningeal irritation. If the encephalitis symptoms are very severe, severely affecting the cerebrospinal fluid, the patient may even experience limb paralysis, epileptic seizures, limb convulsions, and frothing at the mouth. Some patients also suddenly exhibit cognitive dysfunction, becoming dull in response, with noticeable impairment in attention, memory, calculation, and judgment abilities. Some children may exhibit psychological symptoms and must receive timely treatment.