Jock itch is a fungal skin infection that causes an itchy rash in warm, moist areas of the body, such as the groin and inner thighs. It is also called tinea cruris and is caused by fungi that thrive in warm, moist areas of the body. Jock itch gets its name because it is common in athletes, but it can affect anyone who sweats a lot or has a weakened immune system. The condition can range from mild to serious and usually clears up in 1 to 3 weeks with antifungal creams and self-care.

Symptoms of jock itch include a spreading rash that begins in the crease of the groin and moves down the upper thigh and buttocks, a rash whose center tends to clear as the rash spreads, a rash that may be full or partially ring-shaped, itchiness, and scaly skin. The rash may also be bordered with small blisters.

Jock itch is caused by fungi that thrive in warm, moist areas of the body and is often caused by the same organism that causes athletes foot. The rash can spread from person to person with skin contact or from sharing contaminated towels or clothing. Risk factors for jock itch include being male, being a teen or young adult, wearing tight clothes that irritate the skin, having moisture in the groin area from sweating, wearing a wet bathing suit for a lon...