What type of injury is characterized by bleeding under the skin surface?

A contusion, commonly known as a bruise, is characterized by bleeding under the skin surface, which occurs when small blood vessels are damaged due to trauma. The released blood accumulates in the surrounding tissue, leading to the discoloration associated with bruises. This injury is typically the result of a blunt force impact that does not break the skin but causes damage to the underlying vascular structures.

Understanding this distinction is crucial in various fields, including medicine and emergency response. Contusions can vary in severity and appearance depending on the force of impact and the individual's skin tone, with initial redness often transitioning to purples, blues, and greens as the bruise heals. Identifying a contusion correctly is vital for determining treatment and monitoring for potential complications.