Why do you get a fever when you're sick? - Christian Moro?

You get a fever when you're sick because your body is fighting off invaders like tiny enemies.

Imagine your body is like a castle, and when you're sick, little germs, think of them as sneaky pirates, try to take over. Your body’s defenders, called white blood cells, rush in to fight the pirates. But fighting takes energy, and one of the ways your body uses that energy is by making you feel warmer, just like when you're running around playing and get hot.

Your body has a special control center, kind of like a thermostat, called the brain (specifically, part of it called the hypothalamus). When your defenders are busy fighting, they send signals to this control center, telling it to raise the temperature in your body. That's why you feel hot, it's like turning up the heat in your castle!

Sometimes, this extra warmth helps your defenders work better and can even push out the pirates faster. It’s not magic, just your body working hard to make you healthy again!