What is a localized soft tissue injury characterized by swelling and bruising called?

A localized soft tissue injury characterized by swelling and bruising is known as a contusion. This type of injury occurs when small blood vessels under the skin rupture due to impact or trauma, leading to bleeding into the surrounding tissues. As a result, the skin may appear discolored, often shifting in color as the hematoma (the pool of blood) resolves over time. The swelling and discoloration are typical signs of a contusion, distinguishing it from other types of injuries, such as strains or sprains, which involve damage to muscles or ligaments rather than direct bruising of soft tissues.