I've thought about seeing a derm about it, but the problem is that the rash doesn't stick around in it's orignal form all that long. I'd need a doc to work on a weekend and that certainly isn't going to happen.

My shorter weekday rides don't trigger it...even if I ride before the redness has totally gone away.

I think I need to befriend a derm and then ride with them so that they can see it when it's new!