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Erythema (Ancient Greek: ἐρύθημα, from Greek erythros 'red') is redness of the skin or mucous membranes, caused by hyperemia (increased blood flow) in superficial capillaries. [1] It occurs with any skin injury, infection, or inflammation .
Erythema multiforme (EM) is a skin condition that appears with red patches evolving into target lesions, typically on both hands. [2] [3]It is a type of erythema possibly mediated by deposition of immune complexes (mostly IgM-bound complexes) in the superficial microvasculature of the skin and oral mucous membrane that usually follows an infection or drug exposure.
Necrolytic migratory erythema (NME) is a red, blistering rash that spreads across the skin. It particularly affects the skin around the mouth and distal extremities; but may also be found on the lower abdomen, buttocks, perineum , and groin.
Erythema nodosum (EN) is an inflammatory condition characterized by inflammation of subcutaneous fat tissue, resulting in painful red/blue lumps or nodules that are usually seen symmetrically on both shins, on the thighs, arms, and elsewhere. [1]
Erythema marginatum (also known as chicken wire erythema) [1] is an acquired skin condition which primarily affects the arms, trunk, and legs. [2] It is a type of erythema (redness of the skin or mucous membranes ) characterised by bright pink or red circular lesions which have sharply-defined borders and faint central clearing.
Erythema annulare centrifugum; Erythema chronicum migrans; Erythema gyratum repens; Erythema marginatum; Erythema multiforme; Erythema multiforme minor; Erythema nodosum; Erythema nodosum et multiforme; Erythema perstans; Erythromelanosis follicularis faciei et colli
Erythema annulare centrifugum (EAC), is a descriptive term for a class of skin lesion [2] presenting redness in a ring form (anulare) that spreads from a center (centrifugum). It was first described by Darier in 1916.
In dermatology, erythema multiforme major is a form of rash with skin loss or epidermal detachment. The term "erythema multiforme majus" is sometimes used to imply a bullous (blistering) presentation. [2] According to some sources, there are two conditions included on a spectrum of this same disease process: Stevens–Johnson syndrome (SJS)