Dermatology/Red patch of skin?
What is this red patch of skin on my chest? I vaguely recall a few years ago falling and hitting my chest onto an objects which caused my skin to turn red. Now, years later it hasn't healed at all. The redness appears to come from right under the skin.
An erythema (Gk. euruthema = red) refers to a skin redness that affects a localized area of the skin, due to an inflammation of the skin, like trauma. Erythema results from dilation (widening) and congestion of the skin capillaries.
If the red patch bothers you there is Kelo-cote which is OTC or laser which will lighten the area.