Hi..My 14 year old daughter gets a rash..pin prick rash when she gets hot...walks into a warm shop, dances or even just brushing her hair...it usually starts on her arms/hand or stomach.....one she cold down it goes..this can be as little as 2 minutes or maybe 10.......it can also happen when going from hot to cold......
Hi, It seems to be cholinergic urticaria. It is an allergic reaction to raised body temperature. I would recommend you to take antihistamines like tablet cetirizine 10 mg. Hope I have answered your query. Let me know if I can assist you further.