Popcorn has an issue.
She started licking it about a week ago and it kept getting worse. The vet says she likely got something caught in her harness and had it rubbing against the skin. He sold me some antibiotics and a salve and a lampshade to keep her from licking it. No dog of mine is going to wear a lampshade. There's no way she would sleep in that thing, so I found a post surgical suit for her to wear.
Her butt is too big for it so I safety pinned it out of the way. She still has access to her important parts...
It took her a little while to get used to it. But as evidenced by the second picture, it doesn't seem to have impacted her ability to nap.