That Discoloured Nail Is Probably Not Going Away on Its Own
It started as a small white or yellow spot under your toenail. Now the nail is thickened, discoloured, crumbly, and embarrassing. Nail fungus (onychomycosis) affects up to 10% of the adult population – and it is notoriously stubborn. At our practice in Zürich Seefeld, I help patients get effective treatment for nail fungus while also investigating why it developed in the first place.
What Causes Nail Fungus?
Onychomycosis is caused primarily by dermatophyte fungi, with Candida and non-dermatophyte moulds also responsible. The fungi thrive in warm, moist environments – which is why toenails are affected far more often than fingernails. Risk factors include advancing age, diabetes, peripheral vascular disease, immune suppression, athlete’s foot (which can spread to nails), communal showers and swimming pools, nail trauma, and excessive sweating.
Why It Matters Beyond Cosmetics
While nail fungus is often considered a cosmetic issue, it can cause discomfort when wearing shoes, serve as a reservoir for recurrent skin fungal infections, lead to secondary bacterial infections in diabetic or immunocompromised patients, and indicate underlying conditions (diabetes, immune deficiency) that need attention.
Diagnosis
Clinical appearance is suggestive but not diagnostic – psoriasis, trauma, and other conditions can mimic fungal infection. I confirm the diagnosis with nail clippings sent for microscopy and culture, which identifies the specific organism and guides treatment choice.
What We Do: Treating Nail Fungus Effectively
Topical antifungals: Amorolfine nail lacquer or ciclopirox for mild, distal infections affecting less than half the nail. Requires consistent application for 6-12 months.
Oral antifungals: Terbinafine or itraconazole for moderate to severe infections. Oral treatment is more effective than topical alone. I monitor liver function during treatment.
Combination therapy: For stubborn infections, combining oral and topical treatment improves cure rates.
Address underlying factors: Optimising blood sugar in diabetics, treating concurrent athlete’s foot, improving foot hygiene and shoe choices.
Prevention strategies: Proper foot hygiene, antifungal powder in shoes, breathable footwear, treating athlete’s foot promptly, and avoiding walking barefoot in communal areas.
Immune support: Optimising vitamin D, zinc, and general immune function to support the body’s ability to fight fungal infections.
Conclusion
Nail fungus is treatable, but patience is required – nails grow slowly, and full resolution takes 6-12 months for fingernails and 12-18 months for toenails. If you have discoloured or thickened nails, start treatment sooner rather than later. Book an evaluation at our practice in Zürich Seefeld.
