Erythema multiforme

Description

Erythema multiforme is a self‐limiting reactive inflammatory dermatosis triggered by cell‐mediated hypersensitivity, most commonly to drugs or infection, particularly Herpes simplex. It is characterised by an eruption of macules, papules, nodules, vesicles and/or bullae affecting preferentially the dorsal aspects of the hands and forearms. It may also involve oral and genital mucous membranes.

Excludes

• EB13 – Stevens-Johnson syndrome or toxic epidermal necrolysis

Exclusions from above levels

• 1B72.0 – Bullous impetigo of the napkin area
• 1F23.12 – Napkin candidosis
• EH71 – Dermatoses precipitated by drug therapy