Jock itch is a fungal infection of the skin on the groin and inner area of the thighs. The medical name for jock itch is tinea cruris.
Common fungus organisms that grow best in warm, moist areas cause jock itch. Fungus can be transmitted from one person to another by:
Hot, humid conditions can increase your risk of jock itch. Other risk factors include:
Both men and women can be affected. The condition is more common in men, especially those who perspire heavily.
Jock itch causes a chafed, itchy, and sometimes painful rash around the groin and thigh. The area near the anus may also be affected. The rash is:
Jock itch can usually be diagnosed based on the appearance and location of the rash. Other skin problems may look similar to jock itch. If you are not certain of the diagnosis, contact your doctor.
The doctor will ask:
In some cases, your doctor may order a lab test of the infected skin area.
Over-the-counter antifungal creams can usually treat jock itch. Creams or lotions work better on jock itch than sprays. In severe or persistent cases, your doctor may prescribe stronger creams or oral medicine. Use your prescription for the entire time that your doctor recommends. This will help prevent the rash from returning. If your rash does not go away within a month of treatment, call your doctor.
Antifungal creams for jock itch include:
All of these medicines can effectively treat jock itch. Some (such as terbinafine, naftifine, butenafine) may work faster, but are often more expensive.
Creams are usually used for 2-4 weeks. Follow the instructions given on the package or by your doctor or pharmacist.
Note: Do not use antifungal creams recommended for athlete's foot. These may be too harsh for the groin.
If the rash doesn't improve with the cream, your doctor may need to prescribe an oral medicine.
Call the doctor if the rash begins to ooze. The rash may be secondarily infected with bacteria. If your doctor confirms this, you may be given an antibiotic.
Take these steps to help prevent jock itch:
American Academy of Dermatology
American Academy of Family Physicians
Canadian Dermatology Association
Tinea cruris. EBSCO DynaMed website. Available at: https://dynamed.ebscohost.com/about/about-us. Updated July 16, 2012. Accessed July 23, 2012.
Tinea infections. Family Doctor.org website. Available at: http://familydoctor.org/familydoctor/en/diseases-conditions/tinea-infections.html. Updated November 2010. Accessed July 23, 2012.
Last reviewed December 2013 by David L Horn, MD, FACP
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.