Immediately after the injury, fresh, oxygen-rich blood appears bright.
The shifting hues of a bruise are a visual indicator of the healing stages: Lividi
(bruises) are common skin discolourations that occur when small blood vessels (capillaries) near the skin's surface break from the impact of an injury, causing blood to leak into the surrounding tissue. Biological Process Immediately after the injury
Around day 5–10, the body begins breaking down haemoglobin into biliverdin . Lividi
The bruise is accompanied by extreme swelling or severe pain. The person is taking blood-thinning medications.
Apply a cold pack for 10–20 minutes several times a day during the first 48 hours to constrict blood vessels and reduce leaking. Compression: Use an elastic bandage to minimize swelling.