Headache in a 6-year-old child is first considered to be a headache caused by fever following an upper respiratory tract viral infection, and the body temperature needs to be monitored. If the body temperature is below 38.5℃, physical cooling, alcohol rub, hot bath, etc., and drinking more water can be used. If the temperature is more than 38.5℃, you can take the antipyretic drug ibuprofen suspension orally and the antiviral drug busulfan oral solution orally. In another case, the headache may be caused by viral encephalitis after a viral infection, which needs to be diagnosed in the hospital by blood tests, head CT and MRI, and in severe cases, lumbar puncture and cerebrospinal fluid tests. If it is viral encephalitis, you need to be hospitalized, and after about 2 weeks of antiviral treatment, you can usually be completely cured.