It doesn’t itch, and it’s not raised. He might have a slight fever, but nothing much over the warmth that all of us are experiencing (I don’t trust our thermometer, but it seems to say he’s slightly warmer than usual), but he does say he feels a little dizzy when he lies down. The rash was actually there on his left cheek a couple of days ago, but it faded with some cortisone cream and only came back yesterday evening (though I attributed it then to the sun, even though we’d all worn sunscreen). He’s a little hoarse, but he claims he feels fine otherwise.
Fifth? Scarlet? Other?
Fun, fun, fun. 
I’m doing this race as my first 50K/ultra in July 2012. I’m so tardy to the party but...
Scarlet feels like sandpaper, and it shows up in the creases first (armpits, back of knees, etc.) Fifths would be more on the face, and bright red. I vote for other. Either something viral, or just plain heat rash.
I love sharing this because it’s such a classic case. Here’s Audrey’s Fifth:
http://www.flickr.com/photos/sailormouth_2003/sets/72157600341658464/
Both my kids had this last year… looks mighty like Fifth to me. With my two it started at the head and worked its way down the body to the feet. Lasted about five days all up. Cool showers helped.
No clue – but I do know during midwestern summers, I suffered mightily with heat rashes time and again as a child. I hope he is feeling better!
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