What is Infection | Cincinnati Children's?

An infection happens when tiny, invisible germs sneak into your body and start a party where you did not invite them.

Think of your body like a sturdy castle. Your skin is the high wall that keeps enemies out. Sometimes, a germ slips through a tiny crack, like a door left slightly open. These germs, called bacteria or viruses, are too small to see, but they are busy little workers that multiply quickly. When too many gather, your body sounds the alarm. This is why you might feel tired, hot, or achy. Your immune system is the castle guard. It marches out to fight the invaders. This fight is what causes a fever or a runny nose. It is your body’s way of saying, “I am working hard to clean house!”

Germs love to travel on your hands. Imagine touching a doorknob or a toy, then touching your face. The germs jump to your eyes, nose, or mouth. This is how they get inside.

Doctors at Cincinnati Children’s Hospital help you by checking which germ is causing trouble. Sometimes they give medicine, like antibiotics, to help your guards win the battle. Washing your hands with soap is like washing the castle walls. It stops the germs from crossing the gate. So, an infection is just your body having a small battle with invisible visitors, and it usually ends with you feeling better and stronger again.