I'm guessing you mean "urticaria", or the itching, inflamed skin eruption people can get when exposed to something they're sensitive or allergic to.
If so, then yes, I have seen homeopathy
help -- and rather quickly at that. It's important to be using the right remedy, though - and thousands exist. Apis and urtica urens are 2 that come to mind. You may need the er if wheezing
also -- be safe!