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unknown cause for rash

I have been getting a rash off and on since winter came. The rash lasts a few minutes but it is extremely itch and prickly. When i go out in the cold and return into a room that is warm/well heated my skin breaks out in a rash. The dermatologist said it might be some type of allergy. He has prescribed numerous medications and i am still getting the rash. I'm starting to worry it might be a symptom for something serious. I have been looking online for answers and have seen posts suggesting cancer all the way to hiv. Any suggestions? Am i over reacting?
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Avatar universal
Self-diagnosis, myself includes always ends up with the worst assumptions, cancer, parkinson or some other autoimmune disease.
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Avatar universal
it actually could be both, or utacharia from being in a dry room
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Avatar universal
Actually cold utacharia, hives form, when you were in the cold and then rapidly heated up such as entering a warm room. A simple test, would to put some ice cube for 10-20 minutes on your arm then heat it up, and see if hives form.
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Avatar universal
Went to get an allergy test this week. Doctor said i wasxnt allergic to anything but likely for me during my appointment my skin started to breakout when i entered the room ( which was hot) and he diagnosed it as cold urticaria. I never had this last winter this is the first time in my life this is occurring so is his diagnose wrong?
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Avatar universal
sounds like cold utacharia, its pretty rare. unless you have other allergies as well. im suprised he dint do a test. You can do one yourself, put an ice cube on your arm or some other skin area, for 10-20 minutes if you cant tolerate it, and then heat it up, or warm yourself up, and see if any hives form
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