ouch
it's never a pretty thing
I usually get them early in the season then somehow get used to it, and don't get them so often
I wouldn't be surprised if riding in wet shorts is problematic.
I mountain bike (and road bike to train) and feel like a complete geek that I change out of my shorts into anything else right after the ride...but that does seem to help
do you eat much yogurt? that contains a lot of the good bacteria needed to control that yeast...
and there's always fluconazole....one pill and a few days later everything is happy again!
I'll be interested to see if there are any other suggestions....
Namaste,
~T~