Why Bruises Change Color?
A bruise is caused when tiny blood vessels or capillaries are damaged or broken near the surface of your body without breaking the skin as the result of some kind of trauma to the skin. Broken capillaries leak blood in the surrounding tissues, which causes tenderness and discoloration under your skin. A bruise is also medically referred to as a contusion. As the bruise heals, your body absorbs that leaked blood. That’s why the appearance of a bruise changes.