Toenail fungus is similar to Athletes foot. Athletes foot is a fungal infection of the skin. It is a very common infection of the foot, occurring on the sole of the foot and also between the toes. The same fungus that can infect the skin also can infect the toenails, causing the nail to become discolored and thickened. In fact, many cases of toenail fungus are caused by an Athlete's foot condition.
The treatment for toenail fungus differs from athletes foot, however. Athletes foot usually responds well to topical antifungal medication. While mild cases of toenail fungus may respond to topical medication, such as Formula 3, most require other forms of treatment. These include a three month course of oral antifungal medication or treatment with a laser.