Jj (Rhode Island) on 03/18/2017:

That said, for other, unrelated reasons, I switched to a whole foods plant based diet. After making this switch, the jock itch went away completely. It leads me to believe that either (1) something I was eating (eggs, dairy, etc.) was causing it or (2) something I was not eating but now eat on a regular basis (legumes, whole grains, fruits, vegetables, seeds, nuts) has prevented the jock itch from returning. I recommend this strongly for anyone who has been struggling with jock itch.