There is an OTC doggie cream for itch and irritation that I used. I washed the area with sensitive shampoo and then put the cream on watching her to make sure she didn't lick it off. You could put a diaper on here but air flow to the area should help to heal any irritation faster. I don't know how well topical creams will help if it's a UTI though. Just keep her drinking and peeing.
I feel for Miss Maggie if it is a UTI! I'm prone to them and they make me miserable! /forums/images/%%GRAEMLIN_URL%%/frown.gif