I recently got a rash under my arms after working in the extreme heat we've been having. The rash lasted a few days then the skin became very dry under my arms. i didn't do anything to treat it and now things are back to normal. Anyways, I checked out a few links and found some information which some might be useful to others who have gotten a rash in this hel_l heat.

http://dermnetnz.org/hair-nails-sweat/miliaria.html

http://en.wikipedia.org/wiki/Miliaria

Didnt look at links, but i use Snake Brand prickly heat powder, Classic, it works quik and and cools on skin niceley,