I used to be allergic to the smell of skunk. It made me break out in hives. What unusual thing makes you break out in hives?
My mom breaks out in hives if she goes out in the sun. we live in Florida, so she wears a LOT of sunscreen. It doesn't always help though.
Swimming in cold water. It's funny that I could swim in cold water until puberty with no problems. since about age 13, it gives me hives.
Also, it's just in fresh water. a cold swimming pool or a cold shower causes no problems. hummm…
i'm not certain of how to answer this question because as far as i know i've never had any problems with hives.