Athlete’s foot is a very contagious foot fungal infection that affects the skin. It often spreads to the toenails and then to the hands. Athlete’s foot can be difficult to cure specifically if you have diabetes or a weakened immune system. Most of the athlete’s foot conditions we have come to our clinic are caused by a variety of fungi, which can be grouped into the same category as jock itch and ringworm, which are called dermatophytes. This fungus thrives in conditions that are closed, moist, and warm. The fungi feed off of keratin, which is a protein that is found was in the skin, hair, and nails. The percentage for contracting athletes' foot increases when you walk barefoot anywhere. The risk for developing athlete’s foot will also depend on the susceptibility of each individual, particularly individuals with impaired immune systems or diabetes.