Laboratory-supported diagnosis and management with appropriate antifungal therapy for skin, nail, and mucosal fungal infections. Differentiating the type (dermatophyte, candida, yeast) determines the choice of treatment.
Indication
- Dermatophyte infections such as tinea pedis (athlete's foot), tinea cruris (jock itch), tinea corporis (ringworm of the body), and tinea capitis (scalp ringworm)
- Onychomycosis (nail fungus) — thickening, yellowing, brittleness
- Candida infections — oral thrush, vaginal candidiasis, intertrigo (in skin folds)
- Pityriasis versicolor (a yeast-related superficial skin infection causing color changes)
- Fungal infections developing after diabetes, immunosuppression, or prolonged antibiotic use
- Evaluation for systemic therapy in cases unresponsive to topical treatment, with widespread involvement, or with nail involvement
Preparation
- Avoiding topical antifungal creams within the last 4 weeks improves the diagnostic yield of skin scraping
- Onset of symptoms, animal contact, shared shower/pool use, and sweating habits are reviewed
- In cases of nail involvement, nail polish should be removed at least 1 week prior
- Information about accompanying diabetes, immunosuppression, or corticosteroid use should be shared
- Liver function tests may be requested if systemic treatment is planned
How it's performed
- The physician examines the lesion with a dermatoscope and evaluates the typical distribution
- For diagnosis, scrapings from the lesion edge are taken for direct KOH (potassium hydroxide) microscopy; fungal culture is sent if needed
- In cases of suspected nail fungus, a nail sample is taken for laboratory examination
- For superficial and limited cases, a topical antifungal (terbinafine, clotrimazole, sertaconazole, etc.) is prescribed
- For scalp, nail, or widespread tinea and resistant cases, a systemic antifungal (terbinafine, itraconazole, fluconazole) is planned
- Additional recommendations are provided for accompanying bacterial infection, sweating, or contact factors
Post-procedure
- Clinical improvement is expected in 2-4 weeks for superficial skin fungus, with treatment continued for an additional 1-2 weeks
- In nail fungus, treatment response is seen as the nail grows, on average over 3-12 months
- Liver function monitoring every 4-8 weeks for patients on systemic antifungals
- Disinfection of shoes/socks, keeping skin dry, and moisture control to prevent recurrence
- Re-evaluation in case of new rash, redness, or rapid worsening of the nail
Risks
- Topical corticosteroids masking and spreading the fungus in case of misdiagnosis (tinea incognito)
- Burning, redness, and allergic contact dermatitis from topical antifungals
- Elevated liver enzymes and drug interactions with systemic antifungals
- Overlooked underlying diabetes or immune disorder in resistant or recurrent cases
- Mild pain or temporary tenderness during scraping and sampling
FAQ
How long does fungal treatment take?
While 2-4 weeks may be sufficient for skin fungus, treatment for nail fungus may take months. Stopping treatment early may lead to recurrence.
Are corticosteroid creams used for fungal infections?
Corticosteroids do not treat fungal infections; when used alone, they suppress and spread the disease. They are recommended only as part of a combination, under physician evaluation.
Are fungal infections contagious?
Dermatophytes can spread through contact, shared towels, shoes, and damp surfaces (pools, public baths). Hygiene measures and not sharing personal items are important.
Does laser help nail fungus?
Laser therapy may be considered as a supportive option in some nail fungus cases, but the main treatment remains evidence-based antifungal medications. The decision is made based on the individual clinical situation.
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