If you think you have athlete's foot, try a nonprescription antifungal ointment, cream or powder. Keep your feet as dry and clean as possible. If these measures do not help, make an appointment to see your doctor. Call your doctor for a more urgent evaluation and treatment if you see spreading redness or have fevers.
If you have diabetes and any foot problems, see your doctor right away. People with diabetes easily get skin infections, so they should see a doctor as soon as anything unusual appears on their feet.