what causes discoloration of toenails
Fungi are capable of producing many colors, and the species that invade nails and cause a discolored toenail are no exception. In laboratory culture, the so-called dermatophytes are predominantly yellow, mahogany brown, or reddish, while saprophytic fungi that invade nails are often green, black or brown, or colorless.f you notice a discolored toenail, it's best to take care of it right away. See your doctor to confirm that treatment for fungus is a sensible approach, and begin treatment immediately. A fungal nail infection is easier to treat in its early stages.