ATHLETE'S FOOT - it is fungal infection also. Slightly different fungus work in this case. Fungus live on our skin like many other microorganisms. In favorable conditions (dark, warm, moist) start multiplying causing infection.
Having spotted foot skin scaling, eachiness (not always both symptoms) we need to act.
Plenty of products available for such a ocassion. Should be used frequently till the skin looks normal again.
TO PREVENT ATHLETE'S FOOT are needed: washing legs, changing socks every day. For individuals prone to feet sweating using antifangus products is advised, particularly between toes, before any skin changes appear.