When is topical antifungal treatment recommended for nail fungus?

A clinician may look at how many nails are affected, how much of each nail has changed, and whether the infection reaches the nail root. Topical medicine is applied to the nail and nearby skin, so regular use matters. Thickened, crumbly, discoloured nails can have causes other than fungus; confirmation helps avoid treating the wrong problem. A broader or deeper infection may need a different plan, such as prescribed medicine taken by mouth or combined care.

Arrange an assessment if a nail is becoming thicker, brittle, yellow or separated from its bed. Use the recommended product exactly as directed, keep the nail clean and trimmed, and allow the product to dry before covering it. Do not share nail tools, socks or footwear. Keep feet dry and wear breathable shoes; disinfect or replace items that remain damp. Do not stop as soon as the surface looks better, because healthy nail growth takes time.

Seek prompt medical advice for spreading redness, warmth, swelling, pus, significant pain or fever around the nail. Arrange an earlier review if you have diabetes, reduced circulation, reduced immunity, or an injured nail. If several nails are changing, the nail is very thick, or treatment is not improving the problem as expected, a clinician can reassess the diagnosis and treatment choice.

Ask whether the nail changes have been confirmed as fungal, whether a topical product is suitable for the depth and extent of infection, how to apply it around a thick nail, and what signs should prompt a review.