Clinical QuickieDermatology
Fungal Skin Infections
Name the site before choosing the treatment.
Dermatophytes follow keratinized tissue
Tinea corporis, pedis, cruris, capitis, and onychomycosis differ by site and treatment requirements.
Candida prefers moist folds
Intertriginous erythema with satellite papules/pustules can suggest candidal involvement, but irritant intertrigo can coexist.
Steroids can disguise fungal disease
Topical corticosteroid use can alter morphology and allow dermatophyte infection to spread — tinea incognito.
Confirm when the pattern is uncertain
KOH microscopy or other targeted testing can prevent prolonged treatment of eczema, psoriasis, or another mimic as 'fungus.'
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