What Is a Nail Fungus?
Onchomycosis is a fungal infection of the toenails or fingernails. The infection causes the fingernails and toenails to discolor, disfigure, thicken, and split.
Symptoms: Onychomycosis can discolor the nail causing the nail to turn yellow or black. The nail can also become brittle and deformed. In most cases fungal infections of the nails are only a cosmetic concern. However, if left untreated the nail can over grow and press onto the underlying skin causing pain and irritation.