The normal temperature of human body is 98.6°F, but it varies.
We consider the rise in body temperature as fever if it crosses the mark of 99.4°F when taken orally and 100.4°F when taken rectally. Rectal checking of temperature is done in infants.
And fever is always considered a good sign which shows that the immune system is functioning well.
Infants under 3 months should be taken to doctor if they have fever above 100.5°F.
Next Steps
As long as child is active and playful, feeding well, urinating proper, passing stools normally, don't panic.
Feed well and maintain proper hygiene.
Health Tips
Consider going to doctor, if child gets dull and drowsy with fever.