Onychomycosis or nail fungus is a common and contagious nail disease. It is characterized by the development of fungi that feed on the keratin of the nail. Clinically, the nail begins to peel off at one edge, thicken and whiten. The nail yellows, becomes opaque and crumbles, it becomes soft and crumbly. The fungi responsible for onychomycosis are dermatophytes (90%) or yeasts and more rarely molds. Contamination occurs via wet floors in public places, towels and bath mats, pedicure instruments which have themselves been contaminated by a sick person. Humidity promotes the proliferation of fungi, especially in sports or safety shoes. In order to prevent nail