I would try some saline solution, if she will let you bathe her sore bits. About 1 tablespoon of salt to 1/2 pint warm water. Any stronger and it will sting, and you won't be popular.
Otherwise it wil be a trip to the Vet.
PS. Please don't use human creams or ointments on her as some of these can be extremely toxic to felines. (Not being patronising, but some people don't know)