Bruises develop when tiny blood vessels under the skin burst or break, most frequently as a result of a bump or fall. The black-and-blue color is brought on by blood seeping into the tissues beneath the skin. Bumps (contusions) frequently take on hues like purple black, reddish blue, or yellowish green as they recover.
What does a bruise with these colors mean?
If the color of your bruises is yellow, they will shortly be fully healed. The yellow color represents this last stage of recovery. Red blood cells degrade, releasing iron-rich protein called hemoglobin into the body.What does a bruise that is both black and yellow mean?
These hues are a result of the substances biliverdin and bilirubin, which the body produces when hemoglobin needs to be broken down (blood). After the initial trauma, between 10 and 14 days pass before the last stage of bruising appears.
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