Hello. Thanks for writing to us at healthcaremagic A nail affected by Fungal infection Or onychomycosis appears discoloured; deformed; thickened; brittle; subungual debris accumulates beneath the nail plate and separates it from the nail bed. I would suggest a Nail plate KOH examination to look for fungal elements, which would confirm the diagnosis. Only oral antifungals work for Onychomycosis e.g Fluconazole, Terbinafine Or itraconazole. Topical antifungals like ciclopirox olamine or Amrolfine hydrochloride in a specialized base constituted as a nail lacquer to enhance penetration, may also be used simultaneously. Treatment is as long as 2-3 months for a finger nail Onychomycosis. Antifungals are prescription drugs and therefore I would suggest that you seek an appointment with a dermatologist in your region for the needful. Regards