EXTREMELY watered down vinegar (start out with about one part vinegar to 7 parts water and slowly work up to about 1:3 if her skin tolerates it). try it on a tiny patch of her skin, first to make sure she doesn't have a reaction. either that, or a baking soda bath. both are very soothing.
also, try some baby vapor bath. it has menthol in it, so it works great. put a little extra in than the bottle says to help with the itch...this also works awesome for a stuffy nose!
at 10:48 PM on Jan. 8, 2009