Missie has been over grooming her tummy for almost 3 years, I have been to numerous vets and nothing yet is working, we have slowed it down but not stopped it, her tummy is bare and sometimes gets very red and inflamed. I use anti-biotic cream when this happens and it comes right after awhile. It worries me to no end that I cannot help her more.
Agreed that stress is one of the main factors. It can even be from something as small as the relocation of a litter tray. She is most likely doing it to mentally soothe herself. Find out what is causing her stress and the behaviour should subside.