Vinegar Treatment for Toenail Fungus The most familiar kind of infection that's caused in the nail is named DSO (Distal Subungual Onychomycosis). Athlete's foot comes from this fungus. The skin beneath the nails are infected by this nail fungus, and it continues infecting the toe nail. Learn more about warning signs and cures for different kinds of nail fungus with all the available treatments such as topical options, natural remedies and medications.