Leader Povidone Iodine First Aid Antiseptic Wound Cleanser Wound Wash Antiseptic Soap Athlete s foot is a fungal infection that affects the upper layer of the skin of the foot especially when it is warm moist and irritated. It is as also known as tinea pedi and ringworm of the foot. Athlete s foot most commonly develops between the toes. It usually causes burning stinging redness and itching. It also causes flaking of the skin in some people. Although it is contagious athlete s foot can usually be treated with over-the-counter (OTC) medication.