Hi , From your explanations it looks like of Viral Etiology.Which can Stay for another Day or 2. What you need to Do is to give the child Tyelenol based on weight of child which can be taken at 6 hrs interval and Plenty of Fluids. However ensure that child has No Rashes, Urination problem or Ear Ache
. If Fever
extends beyond 2 days you need to consult your Doctor to look for any focus of Infection.