Allergies and stress can be the main causes, so it's important to notice if your cat is overgrooming, and work to identify the issue. If you've noticed your cat biting their fur too much, consider: ... Fleas, allergies and other skin problems can often cause irritations, making your pet bite their fur to scratch the itch!
How do I get my cat to stop licking her bald?
Counter-conditioning, by training your cat to associate something pleasurable, like a treat, with something they fear may also help reduce stress and anxiety. Many times, boredom licking (also known as psychogenic alopecia) is improved by adding another cat or pet.