The severity of foot fungus is dependant on the pain experienced by the patient and how deep the infection has progressed, according to Mayo Clinic. Two main types of foot fungus are Athlete's foot and nail fungus.
Athlete's foot is a painful fungal infection that causes peeling, redness, itching, burning and blisters or sores between the toes and on the sides and bottom of the feet. Athlete's foot is more common among active persons who wear tight shoes and those frequenting community baths and pools.
Nail fungus typically originates as a white or yellow spot under the toenail surface. When left untreated, it may evolve to crumbling and discoloration of the nail and detachment from the skin.
Keeping the feet in dry, clean environments is the best way to prevent nail fungus and Athlete's foot, cites WebMD.