Here are three simple ways to say it for a 6-year-old:
- A bruise is a dark spot on your skin that can show up after you bump or fall. Tiny blood tubes under your skin break and a little blood leaks out, which makes the spot.
- When you get a knock, tiny blood tubes under the skin can get hurt and some blood can sneak out. That makes a purple or brown mark called a bruise.
- A bruise is a colored mark that appears after a bump. It happens because small bits of blood gather under your skin where the tiny vessels got broken. It usually fades away on its own.