Honest to God, my dog woud lick/chew into her hip until it was open, raw and bleeding. It was awful! The wound was the size of basketball. It was an ongoing problem for more than a year, with my vet being no help. I joke that I got my best dressing changing skills with that dog. The 'hood' as I call it went on and stayed on for a very long time. I would take it off, and immediately she would bite at her hip. She was more depressed than mad. It was like I broke her spirit...

To boot, she ended up getting a vaginal infection because she couldn't clean her area!
I ended up putting her on Prednisone for about a week. It worked wonders. She could finally get her hood off! It's been a few years since she has the hood off, and anytime she relapses, I just give her another round (with a very slow wean). It's been the ONLY thing that has worked for her.