My kitty Miley girl has been struggling with something similar for a month now. I have had her to the Vet twice for it. This last time he gave her a shot (cortizone) long acting, to stop the itching. He seemed to think it was an alergy of some sort. She HAS stopped her licking for the time being. I would do the trip to the Vet for sure. A small spot can develop into a staph infection, then you go to the big league. I don't want to scare you. You may want to do some internet surfing to get more information on this. It is common with doggies too!