Which term is used to describe swelling of blood within a body part?

The term that describes the swelling of blood within a body part is hematoma. A hematoma occurs when blood leaks out of blood vessels into the surrounding tissues, usually due to injury or trauma. The accumulation of this blood creates a localized swelling, which can be painful and might result in discoloration of the skin.

In contrast, hemorrhage refers to significant bleeding, either internally or externally, but does not specifically address blood collection in one area. Edema is a general term for swelling caused by an accumulation of fluid in tissues, not specifically blood. Inflammation is the body's response to injury or infection, which can involve swelling, but it encompasses a range of other responses and does not solely refer to the presence of blood. Thus, hematoma is the most accurate term for swelling specifically due to the collection of blood.