When you're sick, you usually have symptoms - body changes like a fever that let you know something's not right. By telling a doctor your symptoms, you can help him or her figure out what's wrong. Think of symptoms like clues you need to solve a mystery. If you have enough of them, it can be easy to figure out what's going on! For example, if you have an achy ear and a fever, you might have an ear infection. And if you're throwing up and your stomach hurts, maybe you have a stomach virus. So the next time you're feeling yucky, tell your parents and doctor your symptoms so you can get better!