Athlete's foot is caused by a fungal infection, and this disease is quite contagious and recurring. Generally, the earliest symptoms appear on the bottoms of the feet or between the toes, including itching, peeling, and blisters. If the symptoms are severe, there may also be erosion, exudation, or oozing. Athlete's foot is highly contagious and may spread to other parts of the body over time. It may also be transmitted to family members, and as the condition progresses, the toenails may gradually develop fungal nail infections. Therefore, once you have athlete's foot, you must actively seek standardized treatment, applying antifungal creams. Bath basins or foot towels at home should be used separately from those of other family members to prevent cross-infection. It is advisable to wear breathable shoes frequently, and shoes and socks that have been worn should be sun-dried and disinfected.