Mold on Skin: Fungal Infections, Symptoms, Treatment, and Prevention

True mold (filamentous fungi) rarely colonizes intact skin. The term "mold on skin" typically refers to dermatophyte infections (ringworm/tinea) or yeast infections (Candida), which are often confused with mold.

Common Cutaneous Fungal Infections

• Tinea corporis/cruris/pedis: Annular, scaly, erythematous plaques with central clearing.
• Candidiasis: Moist, erythematous patches with satellite pustules, commonly seen in intertrigo and diaper rash.
• Pityriasis versicolor: Caused by Malassezia yeast, resulting in hypo- or hyperpigmented macules on the trunk.

Symptoms

• Itching, burning, scaling, erythema, and satellite lesions.
• Rarely, deeper infection such as Majocchi's granuloma in immunocompromised individuals.

Treatment

• Topical azoles/allylamines (clotrimazole, terbinafine) for 2–4 weeks.
• Oral antifungals (fluconazole, terbinafine) for extensive, refractory, or follicular disease.
• Keep skin clean and dry; avoid occlusive clothing.

Prevention

• Practice good hygiene; keep skin folds dry; wear breathable fabrics.
• Do not share towels or clothing.
• Treat pets with ringworm.
• Immunocompromised individuals should maintain heightened vigilance.