I’ve had heat related hives for about one year and half, and it was a huge pain. I quit the gym because I would be so frustrated by the itching and the heat after only 15 minutes that it became pointless, and I never got much done.
I gave up and resigned myself to a fate of having cholinergic urticaria for as long as it lasted. Completely unrelated, I started a vegan diet (nothing to do with the hives – just a personal choice), and ever since, I’ve noticed I can take showers and wear more jumpers and run and whatever else without been covered in itchy red hives.
Although I do advocate being a vegan, I’m sure this wasn’t the actual solution. Rather, it was me cutting bad stuff out of my diet and just generally eating better. Either way, if you’ve lost hope with it, I strongly suggest major diet changes.
It worked for me 🙂