 [ Symptoms ] what is ringworm of the skin [ Disease ] ringworm of the skin is an infection caused by a fungus jock itch is a form of ringworm that causes an itchy rash on the skin of your groin area it is much more common in men than in women jock itch may be caused by the spread of athlete is foot fungus to the groin webmd medical reference from healthwise this information is not intended to replace the advice of a doctor healthwise disclaims any liability for the decisions you make based on this information © 1995 2011 healthwise incorporated healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated