An injury that's not too serious can leave your skin bruised.
When we say something or someone is bruised, it means they've got some damage, but it's probably going to heal on its own. If you bump into a door and get a big purple mark on your arm, you're likely feeling bruised. But if you fall off a bike and break your leg, that's not just a bruise - that's something much more serious.
simple past and past participle of bruise
