Athlete's foot can be treated at home in most cases. However, if you have any of the following symptoms, it is important to see a doctor: redness, swelling, pain, blisters or sores, pus, or a foul odor. Additionally, if your symptoms persist after trying over-the-counter treatments or if you have a weakened immune system, diabetes, or poor circulation, it is important to seek medical attention. A doctor can prescribe stronger medications and can also check for any secondary infections. Finally, if you have diabetes, you should visit your doctor regularly to ensure that athlete's foot is not a complication of your diabetes.