Blistering foot odor is caused by a fungal infection that causes skin damage, often occurring unilaterally first, and can become symmetrical after a few weeks or months of infection. The blisters appear mainly on the toes, usually between the third and fourth toes, and can also appear on the soles of the feet. Blistering foot odor is usually deep in small blisters that can reintegrate. Also the skin damage in the middle has characteristic, well-defined borders that can expand outward. Due to the progression of the disease, blistering foot fungus can develop localized blisters. If blistering foot odor is found to be mild, treatment must take care to keep the foot clean, while it can be treated with antifungal medications, applied or combined with oral antifungal medications at the hospital.