Athlete’s foot, also known as tinea pedis, is generally caused by a fungal infection. Fungi are prevalent in the natural world. When the skin barrier of the foot is damaged to some extent, fungi can colonize on the damaged skin surface, making it easy for a fungal infection to occur. After the infection, the fungi use the skin’s barrier layer as a substrate for reproduction and multiply extensively, resulting in cracks in the cells of the stratum corneum layer beneath, thus forming small blisters known as pustules or vesicles. Simultaneously, they stimulate the skin to produce itching.