Athlete's foot often first appears as an itchy red rash, typically beginning between the fourth and fifth toe. It is typically contracted in damp communal places such as public pools, locker rooms or showers. Athlete's foot is a highly contagious, persistent ailment caused by fungal growth on the feet. If left untreated, the skin may become highly sensitive to the touch and infection can also be transmitted to other parts of the body through bedding and clothes. Early treatment will lessen the risk of exposure to others and alleviate the painful symptoms of this condition.