A common treatment for tinea cruris or infection of the groin due to fungus is the application of an antifungal cream, according to Patient. Various antifungal topical agents are available, both through a prescription and over-the-counter preparations at most drugstores.
Types of antifungal creams include terbinafine, clotrimazole, econazole, ketoconazole, miconazole and sulconazole, notes Patient. Patients apply the cream on the rash and the surrounding skin until the rash completely disappears. A doctor usually prescribes an antifungal cream with a mild steroid cream for skin that is particularly swollen, and the patient applies this for seven days. For more serious cases of fungal groin infection, a doctor prescribes oral antifungal medicine such as terbinafine, griseofulvin or itraconazole tablets.