Simplest treatment would be a topical anti fungal nail polish. Fungi nail, fungi cure or better formula 3. Utilize for 3-4 months if this does not clear problem, have fungal culture performed. Although anti fungal nail polishes are notoriously ineffective, in the very early stages they can work quite well. If it persists other treatments include oral medications as well as laser treatment. Start with the simplest first then move forward as needed.

Daniel Margolin