Hi mom1982,
I find just leaving my daughters hives alone is best. But we were told to put a cold flannel on the affected area, trouble is the affected area is always so big we wouldnt find a flannel big enough!!! Keeping cool helps, my daughter puts on the fan and sits in front of it, they do normally go with no other help. The worse bout she had was an allergy to penicillan ear drops, she was so bad we took her to the out of hours surgery at three in the morning...I have to add Im a terrible worry wart and she was sctratching herself to bits, my hubby was not impressed with being dragged out of bed only to be told by the doctor there was nothing he could do!!!
Take care.