Encephalitis is mostly an infectious disease of the central nervous system caused by bacteria or viruses. In the case of viral encephalitis, it is caused by common enteroviruses or herpesviruses, etc., while bacterial encephalitis is usually caused by meningococcus. Pediatric headache is not necessarily encephalitis, because pediatric headache can be caused by cold, but also can be caused by fever, blood flow runs faster. In addition to headache symptoms, children with encephalitis may also have fever, drowsiness, vomiting, convulsions, and impaired consciousness. Headaches may also vary in location, including frontal pain, posterior occipital pain, headache, and temporal pain on both sides. If you can’t tell, it’s best to take your child to the hospital promptly, and cerebrospinal fluid tests may be needed. If the headache is accompanied by panic, shortness of breath, fatigue, chest tightness, etc., it is also important to pay attention to whether there are any heart problems. If it is accompanied by a runny nose, and cheek pain, you also need to consider the possibility of sinusitis.