Jock itch gets its name because it's common in athletes. It's also common in people who sweat a lot or who are overweight. Although often uncomfortable and bothersome, jock itch usually isn't serious. Treatment may involve keeping the groin area clean and dry and applying topical antifungal medications to the affected skin.
Jock itch usually begins with a reddened area of skin in the crease in the groin. It often spreads to the upper thigh in a half-moon shape. The rash may be ring-shaped and bordered with a line of small blisters. It may burn or feel itchy, and the skin may be flaky or scaly. See your doctor if your rash is painful or you develop a fever.
And see your doctor if the rash hasn't improved after a week of treatment or if it hasn't cleared up completely after three weeks of treatment. The organisms that cause jock itch thrive in damp, close environments. Jock itch is caused by a fungus that spreads from person to person or from sharing contaminated towels or clothing. It's often caused by the same fungus that causes athlete's foot.
The infection often spreads from the feet to the groin because the fungus can travel on your hands or on a towel. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
This content does not have an English version. Jock itch or tinea cruris usually causes redness, flakiness, peeling, or cracking of the skin in the groin, thigh, and buttocks area. The rash can look circular, with well-defined or even elevated edges. It can also spread to the area around the anus where poop comes out. It may itch, sting, or burn, or simply feel uncomfortable. A fungus is a microscopic plant-like organism that thrives in damp, warm environments.
Fungi usually aren't dangerous. But when they infect the skin, they cause mild but annoying rashes also known as tinea infections. Jock itch is caused by fungi that normally live on the skin, hair, and nails , called dermatophytes. When the groin, upper thighs, and buttocks area gets warm and moist, they can grow out of control and start to cause symptoms. Jock itch can spread from one person to another by skin-to-skin contact, especially in warm, damp environments.
It can also spread to other areas of the body if someone touches the affected area and touches other body parts. Jock itch often spreads from a fungal infection on the feet, known as athlete's foot. Jock itch can affect anyone who tends to sweat a lot. It most often affects guys, but girls can get it too. A doctor can often diagnose jock itch just by looking at it and asking about symptoms and a person's lifestyle.
Sometimes the doctor will scrape off a small sample of the flaky infected skin to look at under a microscope or to test in a laboratory. These treatments usually need to be applied twice daily. If you develop a tinea infection on your scalp, see a doctor for a prescription antifungal medication.
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