Red: Erythematous means it is red. Comes from the root "erythro" which means red. Erythrocytes are red blood cells. If we say there is erythema, there is redness. If we say the lesion is erythematous, then it is red.
Answered 7/20/2012
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Redness: It means redness--lots of different causes.
Answered 7/5/2012
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Inflammatory: Often the redness is a sign of inflammation and increased cellular activity.
Answered 10/18/2016
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