What is a contusion commonly known as?

A contusion is commonly referred to as a bruise. This occurs when small blood vessels, or capillaries, are damaged due to impact or trauma to the skin, leading to bleeding underneath the skin without breaking its surface. The characteristic coloration of a bruise—ranging from red to purple, and eventually fading to yellow or green—as the body heals, is a direct result of this internal bleeding. This terminology is widely understood in both medical and everyday language, signifying that a contusion specifically refers to this type of injury. The other terms listed—open wound, burn, and fracture—refer to different types of injuries and do not accurately describe a contusion.