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Alternative Names Return to topFungal infection - groin; Infection - fungal - groin; Itching in the groin; Ringworm - groin; Tinea cruris; Tinea of the groin
Definition Return to top
Jock itch, also called tinea cruris or ringworm of the groin, is an infection of the groin area caused by fungus.
Causes Return to top
The body normally hosts a variety of bacteria and fungi. Some of these are useful to the body. Others can multiply rapidly and form infections. Jock itch occurs when a particular type of fungus grows and multiplies in the groin area.
Jock itch occurs mostly in adult men and adolescent boys. It can sometimes accompany athlete's foot and ringworm. The fungus that causes jock itch thrives in warm, moist areas. Jock itch can be triggered by friction from clothes and prolonged wetness in the groin area (such as from sweating).
Jock itch may be contagious. It can be passed from one person to the next by direct skin-to-skin contact or contact with unwashed clothing. Jock itch usually stays around the creases in the upper thigh and does not involve the scrotum or penis. It is often less severe than other tinea infections, but may last a long time. Jock itch may spread to the anus, causing anal itching and discomfort.
Other causes of itching in the groin include:
See also: Vaginal itching
Symptoms Return to top
Exams and Tests Return to top
Your doctor will usually diagnose jock itch based on the appearance of the skin. Tests are usually not necessary. If tests are needed to confirm the diagnosis, either a culture or a skin lesion biopsy (for example, a scraping of the skin) may show the fungus that causes jock itch.
Treatment Return to top
Jock itch usually responds to self-care within a couple of weeks:
Severe infections, frequently recurring infections, or infections lasting longer than two weeks may require further treatment by your doctor. Stronger prescription medications, such as those containing ketoconazole or terbinafine, or oral antifungals may be needed. Antibiotics may be needed to treat bacterial infections that occur in addition to the fungus (for example, from scratching the area).
Outlook (Prognosis) Return to top
Jock itch usually responds promptly to treatment, but some cases last a long time.
Possible Complications Return to top
When to Contact a Medical Professional Return to top
Call your doctor if jock itch does not respond to home care after 2 weeks, or you have other symptoms.
Prevention Return to top
References Return to top
Andrews MD, Burns M. Common tinea infections in children. Am Fam Physician. 2008;77:1415-1420.Update Date: 4/17/2009 Updated by: Michael Lehrer, MD, Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.