Candidal intertrigo is distinguished by its bright, beefy-red appearance and the presence of characteristic satellite pustules at the periphery of the main patch.
Intertrigo (eczema in a fold) is typically more pruritic and may be weepy or scaly, whereas erythrasma is a dry, brownish, asymptomatic patch.
Simple intertrigo is inflammation from friction and moisture; it is more erythematous and lacks the brownish color and coral-red fluorescence of erythrasma.
Inverse psoriasis in the folds presents as a sharply demarcated, smooth, red plaque that lacks the characteristic brown color of erythrasma.
This is a specific, symmetrical drug-related eruption affecting the gluteal and intertriginous areas, distinguished by its acute onset after drug administration.
Tinea cruris (jock itch) is a fungal infection distinguished by its active, raised, scaly border, which is absent in the uniform patch of erythrasma.
