Why do I come out in a rash whenever I exercise?? (Not sweat related)

[BigbreastsBiggerbeard]

I first noticed it on my forearms, totally covered in bright red dots. When I looked in the mirror I realised it was on my neck too, and several times I've seen it on my thighs. It's non itchy.

It's definitely not sweat related as it comes up almost as soon as I start to exercise. Plus, due to health issues I'm not usually able to exercise hard enough to even break a sweat. Plus, I never sweat on my forearms

I did take a pic that I can't locate just now - if I do, I'll post it. But imagine the underside of the forearm COMPLETELY covered in a red rash.

Does anyone know what this could be?

Anyone? Anyone? God, my posts are boring

Was hoping there'd be some other spotty exercisers out there. I'm a freak!

I've just heard of exercise induced anaphylaxis for the first time tonight

Exercise induced urticaria?

Uriticaria - can be triggered by heat or cold

Could be that, I guess. At least it doesn't itch.

Exercise intolerance? Sounds fake but is a thing

Tried an antihistamine before exercising?

Hazardswan - I will try that today actually. Have loads so may as well make use of them

I wouldn't mind so much if I was exercising properly but it's at a very level. Not even rash worthy!