A fever means the body temperature is above normal. Your child has a fever if:
Fever helps fight infections. Most fevers are not harmful. They may last 2 or 3 days.
For fevers of 100 to 102°F (37.8 to 38.9°C), cold fluids and little clothing may be all your child needs. Fever medicines are rarely needed. Fevers help the body fight the infection.