A fever is a temporary rise in body temperature. It’s one part of an overall response from the body’s immune system. A fever is usually caused by an infection.

You can learn more about fevers and when to consult a doctor at https://www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759#:~:text=Overview,usually%20caused%20by%20an%20infection.