Tinea pedis is a superficial fungal disease caused by fungal infections involving the interdigital, plantar, heel, and lateral edges of the foot, and is mainly caused by pathogenic fungi such as Trichophyton rubrum, Trichophyton spp. Geographically, the incidence of tinea pedis is more common in the south of Jiangsu and Huaihuai than in the dry areas in the north, which is related to the warm and humid environment that superficial fungi prefer to live in. As for the population, although there is no significant gender difference in the onset of tinea pedis, the superficial fungus that causes the disease has a significant keratinophilic tendency; at the same time, the keratin layer of the foot is significantly thicker in adults than in children, so it generally occurs more frequently in adults than in children. In addition to direct contact, such as scratching, sharing shoes, socks, towels, and footbaths is also an important way to transmit tinea pedis. It is important to note that fungal infections that occur on the back of the foot, whether primary or secondary to interdigital, plantar, heel, or lateral edges of the foot, are referred to as “ringworm” and do not fall under the category of tinea pedis. In summary, tinea pedis is a superficial fungal disease caused by direct or indirect contact with pathogenic superficial fungi, which is common in warm and humid regions and hot and humid seasons, and is characterized by attacking the cutaneous areas of the interdigital, plantar, heel, and lateral edges of the foot.