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A member asked:
I had a tramaic injury to my back 4 days ago iwhy is it just now turning black
A doctor has provided 1 answer
Bruising: Skin bruises change colors as they resolve. You are going through the normal healing process, most likely. The blood in the bruise is exposed to the outside oxygen and it causes it to turn black by oxydizing hemoglobin into hemosiderin which is black in color.
Answered 7/17/2019
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