Jock itch, or tinea cruris, is a fungal infection that commonly affects the groin area. You're more likely to get jock itch if you sweat a lot, wear tight or damp clothing, share towels or gear, have a fungal infection like athlete’s foot, are overweight, or have a weakened immune system.

Signs & Symptoms
Do Your Symptoms Fit the Diagnostic Criteria of Jock Itch?
Jock itch usually begins as a red, itchy rash in the groin area. It can spread quickly to the inner thighs, buttocks, and skin folds. The advancing edge is redder and more raised than the darker reddish-brown areas that have been infected longer.
To prevent jock itch, keep your groin area clean and dry, shower promptly after exercise, and wash clothes and towels often. If you think you have jock itch, apply a thin layer of JOCK-EZE over the affected area twice daily for two weeks, or as directed by a doctor.
Jock itch (tinea cruris) typically affects the skin of the groin, inner thighs, and buttocks, but it usually does not involve the genitals such as the penis, scrotum, or vulva.
If you're experiencing irritation on the genitals themselves, it may be caused by a different type of fungal infection, such as Candida albicans—a yeast infection. It's best to consult a healthcare provider for an accurate diagnosis.
Yes, many skin conditions can mimic the symptoms of jock itch. Other possible causes of a groin or thigh rash include:
- Psoriasis
- Intertrigo
- Erythrasm
- Sexually Transmitted Diseases
If your symptoms persist or worsen, speak with a medical professional.
Yes. Because jock itch is contagious, it can spread through skin-to-skin contact, including sexual activity. It’s best to avoid sex until the infection is fully treated to protect your partner and prevent reinfection.