The organisms that cause jock itch thrive in damp, close environments. Warm, humid settings that promote heavy sweating — thus washing away fungus-killing oils, making the skin more permeable and more prone to infection — favor its spread.

You're at greater risk of jock itch if you:

  • Are a man, although women can also get the condition
  • Wear tight underwear or athletic supporters that aren't washed after each use
  • Are obese
  • Sweat heavily
  • Have an impaired immune system
  • Have atopic dermatitis, a chronic, inherited skin disease characterized by itchy, inflamed skin
Aug. 17, 2013