Hattie has had this for a while, and I just assumed it would go away, but I guess not!
She has this weird scale on the right side of her body. I'm not sure if it sticks out or something is under it, but it doesn't bother her. She goes around as if nothing's wrong. I'm not sure if she came like this, either. It's not a parasite for sure- she doesn't flash or scratch it against anything.
And in addition to that, she has miniscule white dots on each of her eyes. Again, these don't bug her and she goes around as if nothing's wrong. No flashing or scratching. She is actually the most active, happiest female I've ever seen and owned!
This is a picture that shows both the dot on her eye and her odd scale.