 [ Symptoms ] my cell phone caught fire and i was exposed to chemical fumes [ Disease ] i have had this same problem for years now it is not extremely bad but it is very annoying i am constantly breaking out in random rashes small bumps on a red area that itch like crazy and lasts a couple minutes up to an hour then dissapear i most often get them on my butt or arms but they can appear anywhere from my neck down it happens multiple times a day every single day i have never gotten an exact answer as to what it is but when it all started i was diagnosed with cold urticaria allergy to cold yes it is a real thing at the time i was diagnosed i was literally breaking out and swelling up to the point that i had to go to the er every single time i got even the least bit cold eventually the swelling and such subsided but now i just randomly break out in these crazy rashes even if i am not cold i have always just blamed it on the cold urticaria and went on i do think that the reason my butt and arms break out more than anything else is because those are the coldest parts of my body one way to test for cold urticaria is to take an ice cube and hold it to your arm or anywhere for a few seconds up to a minute and then remove it i do not break out with the ice i break out as that area starts to warm back up and of course it only lasts a few minutes and then it is gone once i stopped swelling up and having to go to the er all the time i stopped taking antihistamine and have not tried to take one since because they all make me extremely tired it may help i do not know i just choose to live with it