If itchy red feet are slowing you down - you may have athlete's foot. Athlete's foot is a condition in which fungus develops on your feet and between your toes, causing itching, burning, scaling and sometimes inflammation and blistering. This fungus can also lead to skin infections in the groin and upper thighs - often called "jock itch", and in some cases, ringworm can develop - appearing as a raised red ring or patch on the skin that is scaly and has very clearly defined edges. These can all be treated by preventing excess moisture build-up on the skin and by using products that contain ingredients to kill and prevent the growth of fungus.