Athlete's foot often happens to people whose feet sweat a lot when they wear closed shoes. It is an infection caused by fungus, which usually appears on the toes.
A podiatrist is a professional in the diagnosis and treatment of diseases and disorders of the foot.
The orthopedist is a doctor who specializes in the skeletal muscle system of the human body including bones, joints, ligaments, tendons, muscles and nerves.
Remember that for the proper selection of health professional that treats athlete's foot you must consider the nature, severity and symptoms you are presenting.