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Note:  Do not rely on this information. It is very old.

Erythema

Erythema, a skin disease in which diffuse redness of the cutaneous surface occurs. The term is very loosely applied. Erythema often occurs in rheumatic subjects. A well-marked form of erythema is Erythema nodosum, in which affection exceedingly painful, reddened, and raised patches are noticeable, usually involving the skin of the leg over the shin bone.