Hello sir, I am suffering from (CU) from almost 5 years. It also occur in winter only... The thing is, when winter starts my body stop sweating and when i expose to sun or lift up heavy weight or when my body heat up.... the itching trigger....and red small bump occur all over my body... for few minutes and then go away.. this only happens in winter only.... Is there any medicines for curing CU or stopping the itching when i go out in sun......because when i try to sweat the itching start