• Clinical science



Erythrasma is a skin infection caused by Corynebacterium minutissimum, a part of the normal skin flora. Optimal conditions for bacterial growth are provided by moist skin fold areas. The infection is particularly common in obese individuals with diabetes mellitus. Patients present with well-demarcated erythematous or brown patches with fine scaling and wrinkling in intertriginous areas (e.g., groin, toe webs). The diagnosis is confirmed by coral-red fluorescence under wood lamp examination. Local disease is treated with topical antibiotic therapy, while extensive disease requires systemic antibiotic treatment.



Clinical features

  • Location: intertriginous areas (e.g., toe webs, groin, axilla)
  • Skin lesion: well-demarcated erythematous or brown patches with fine scaling and wrinkling
  • Pruritus is usually absent or mild.




Differential diagnoses

Intertrigo (intertriginous dermatitis)


The differential diagnoses listed here are not exhaustive.



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last updated 11/29/2019
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