What is the term for a bruise resulting from an injury that causes bleeding beneath the skin without breaking it?

The term for a bruise resulting from an injury that causes bleeding beneath the skin without breaking it is known as a contusion. A contusion occurs when small blood vessels are broken or damaged due to trauma, leading to localized bleeding in the tissue. This bleeding causes the characteristic discoloration seen in bruises, typically evolving in color over time as the body reabsorbs the blood.

Understanding this term is essential in the context of emergency care, as it helps differentiate between types of soft tissue injuries and their implications for treatment. The other terms provided describe related but distinct conditions: ecchymosis refers to a larger area of discoloration typically caused by the same mechanism as a contusion but can arise from other factors; a hematoma is a more severe collection of blood that can occur in a solid organ or tissue and may need medical intervention; a lesion is a general term for any abnormal tissue or injury, which does not specifically denote bruising.