I have cholinergic Urticaria from 2019. The only thing that helps me is sweating. If I keep sweating I don't face this allergy. But in winters its really bad. Because it is difficult to sweat while working out in gym in winters. So when My body temperature rise a little then normal while winter I get all those small bumps all over my body and it feels like a thousand pins and needles are pinching me from head to toe. Please suggest something. I tried antihistamine but it doesn't not help. Any suggestions doctors?