Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs Tinea crurisUpdated: 2020-03-04OverviewJock itch (tinea cruris) is a fungal infection that affects the skin of the genitals, inner thighs, and buttocks.SymptomsIt causes an itchy, red, often ring-shaped rash in these warm, moist areas.TreatmentsTreatment includes keeping the groin area clean and dry and applying topical antifungal medications. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use