How would you describe the appearance of a contusion?

A contusion, commonly known as a bruise, is characterized by discoloration and swelling resulting from bleeding beneath the skin's surface following an injury. This occurs when small blood vessels break and leak blood into the surrounding tissues, leading to the characteristic blue, purple, or even yellowish coloring that may develop as the bruise heals.

The swelling is due to the accumulation of fluid and blood in the area, which often accompanies the discoloration. In contrast, the other options describe different medical conditions or injuries. Redness and warmth are typical of infections or inflammatory responses, clear liquid formation is indicative of a blister, and a severe laceration involves an open wound with potential for bleeding rather than just bruising. Thus, the option correctly encompassing the features of a contusion is the one detailing discoloration and swelling due to underlying bleeding.