Jock itch is caused by a type of fungus that can be spread from person to person or from shared use of contaminated towels or clothing. Jock itch is often caused by the same fungus that results in athlete's foot. It's common for the infection to spread from the feet to the groin, as the fungus can travel on your hands or on a towel.

Risk factors

The organisms that cause jock itch thrive in damp, close environments. You're at greater risk of jock itch if you:

  • Are a man
  • Wear tight underwear
  • Are overweight
  • Sweat heavily
  • Have a weakened immune system
  • Have other skin conditions
Aug. 17, 2013