She did this a couple times before, but she's scratched the outside, not the inside, of her ears raw. There are little bald spots, and a couple sore spots on her ears now.
She had ear mites once before, before we owned her, and ear mites are only on the inside of a cat's ear, right? Also, she's an indoor cat, so how can she have fleas?
Does anyone know what could be causing this? My parents don't want to spend $80 on a vet visit if she isn't "sick".
I've been putting polysporin on the sore spots.