If she has a skin infection she may need antibiotics to reset and rid of these issues. I would recommend you pick up the following products-- they work awesome and even if you still need to go to the vet for antibiotics they are great to have on hand.
Malecetic Otic-- used for regular maintainence of ears (daily to kill yeast and bacteria) squeeze a good amount into ears, massage well, wipe out access. Put on cotton ball and wipe all folds, tail pocket, under paws.
Malecetic Ultra-- use for problem areas. Has steroid in it so don't overuse. Use in same areas above but I don't recommend daily. Maybe 1x a week.
Antibacterial Antifungal shampoo like Pharmeseb. Suds up really well and let sit for at least 5 mins and rinse.
Hope this helps!
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