Which statement best distinguishes diaper dermatitis from candidal diaper dermatitis?

• A. Candidal diaper dermatitis presents with bright red, sharply demarcated edges with satellite lesions and skin-fold involvement
• B. Diaper dermatitis typically shows red, irritated skin without satellite lesions
• C. Both conditions are identical
• D. Diaper dermatitis always involves skin folds

Answer: (A)

Distinguishing features rely on pattern, especially involvement beyond the main rash. Candidal diaper dermatitis tends to be a bright red, sharply demarcated patch with satellite lesions around it and extends into skin folds (inguinal creases, scrotal/vaginal folds) because Candida thrives in warm, moist areas and often spreads into folds. In contrast, irritant diaper dermatitis usually shows redness in the diaper area without satellite lesions and with less tendency to involve folds early on. So the hallmark sign—bright red border with satellite lesions and skin-fold involvement—best identifies candidal diaper dermatitis. The other statements aren’t as specific: irritant diaper dermatitis can be red and irritated but lacks satellites; they are not identical; and diaper dermatitis does not always involve skin folds.