How Bruises Heal
Bruises go through a rainbow of color changes as the body begins to heal itself. The rainbow of color changes mean that your body is breaking down the red blood cells that collect under the skin. As the red blood cells break down, they eventually get flushed away by the body’s natural process. These red blood cells cause the bluish, purplish, reddish, or blackish marks that are typical of a bruise. That's where black-and-blue marks got their name - from their color under the skin. You can pretty much guess the age of a bruise just by looking at its color:
- When you first get a bruise, it's reddish as the blood appears under the skin.
- Within 1 or 2 days, the hemoglobin (an iron-containing substance that carries oxygen) in the blood changes and your bruise turns bluish-purple or even blackish.
- After 5 to 10 days, the bruise turns greenish or yellowish.
- Then, after 10 or 14 days, it turns yellowish-brown or light brown.