I get heat rash/sun poisoning also. My problem is that wearing even a light weight cotton shirt made my rash waaayyy worse. The shirt held the heat against my skin too much. I will be looking into some of the great suggestions from here. I even started shaving my arms (where the rash is the worst. Even a small amount of hair holds A LOT of heat.) and trying any high spf sunblock that was sweat and water resistant. I stay out of the sun as much as possible and use cool showers and oatmeal lotion for the itch. Hand sanitizer is good too.
This is the first year that I got bumps on the tops of my ears. I thought i had been bitten by something and scratched it. Within a couple of minutes I knew I did a bad thing!! They got worse and have taken 2 weeks to fully heal. I am currently looking for hat I can ride in that will keep my poor ears in the shade now! (I know I’m bad, I don’t wear a hard hat on every ride. Please don’t chew me out.)
I had a really bad case of poison oak a few years ago and I wonder if that has anything to do with this suddenly starting out of nowhere? I haven’t taken any meds unless advil counts. Any insight is greatly appeciated:)
Thanks and Good luck!!