I almost posted this exact same question yesterday! I got my SECOND appearance of these heat welts (welps?). It DOES look like some kind of contageous rash or hives, doesn't it? I even took pictures of mine to put on here! LOL. (obviously I chickened out) I'm glad I'm not the only one..and THANK YOU GLC for posting a very common sense/deductive reasoning answer to this issue!

I got this rash (1st time in the season) on the 4th..where I also apparently overdid something with my left knee (grrrrr).. The rash hadn't gone completely away before Sunday's ride...but oh well. I thought I'd drank enough, but now I don't think so. I was out about 3hrs in the midday frame (11-2) and didn't quite finish 40oz of Powerade and water. Shame on me!!!

Oh - and I was wearing Descente Bliss shorts...so I knew it couldn't be elastic or gripper allergy of some kind.. I love those... they leave a nice higher tan line. However.. I also love love my Shebeest Triple S shorts. They're super comfy.

NM Rider - I'm also training for HHH!

I may make a separate post about my knee issue.... wah.