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Short answer How to treat and prevent jock itch Common questions Related questions SourcesJock itch (tinea cruris) is caused by a fungal infection, usually the same dermatophyte fungi that cause athlete's foot and ringworm.
These fungi thrive in warm, moist areas of skin, which is why the groin, inner thighs, and buttocks are common sites. Sweating, tight clothing, friction, and not drying off fully after showering or exercise all make infection more likely. It often spreads from an existing case of athlete's foot, either by touching the feet then the groin or by pulling on underwear over unwashed feet. Sharing towels, clothing, or gym equipment can also pass the fungus along, and excess weight or a weakened immune system raises the risk. Keeping the area clean, dry, and loosely covered is the main way to prevent it.
How to treat and prevent jock itch
Common questions
What causes jock itch?
Jock itch is a fungal skin infection, most often caused by the same dermatophyte fungi responsible for athlete's foot and ringworm. These fungi grow best in warm, damp environments, so sweat, tight underwear or athletic wear, and friction in the groin create ideal conditions. Many cases start when fungus spreads from the feet during dressing or from sharing towels, clothing, or locker room surfaces. Obesity, heavy sweating, and a weakened immune system also increase risk. Treating any athlete's foot at the same time helps prevent jock itch from returning.