Cutty does the same. In fact I have to nudge him when we are going to sleep and tell him "no lick" to make him stop cuz he does it so obsessively that he shakes the bed and drives me nutso. lol. I am not sure if it is allergy or not cuz no matter what food we have been on it has been a problem. He isnt biting his paws or itching so much as just licking like mad. And mostly when it is bedtime so that tells me it is an ocd thing. Gotta love it. Sorry not better advice.