Fevers are a reaction of the body to an infection by bacteria or viruses. In children, fevers are common, and most of the time they go away in 2–3 days at the most.
The average human body temperature is around 98.6°F (37°C). Some people will have higher normal temperatures; others will have lower temperatures.
If the child has an elevated temperature, but his/her behavior is still fairly normal, usually nothing needs to be done. If the child does not feel well, however, keep the child cool, well hydrated, give slightly warm sponge baths, and treat with a mild analgesic formulated especially for children — not aspirin.
Fevers in newborns and young infants should be evaluated differently. They should be seen by a doctor if the fever reaches 100.4°F (38°C) or higher.