If you've noticed your dog is lying around at home incessantly licking its own self more than usual, he/she may be suffering from anxiety. Short of a health problem and ruling out allergies, your dog is probably bored and its' anxiety level has risen. What to do? Exercise would be number one. I'll relate a personal example here: our Rottie, Rogue is an inside dog but spends part of his time alone outside on our deck. I know when I am away he is less entertained. An additional problem for him is that he suffers from a dysplastic front elbow which limits his ability to exercize. Therfore, I had to think outside the box as to how I could stimulate Rogue so he may feel more fulfilled. I came up with the idea of short walking trips at the Town Center and my local shopping center where he could meet people. I also include visits to my local pet-friendly, pet store. I've found the social interaction with people and other dogs on these trips have been positive for Rogue. Although he can't run at our dog park, at least his mind is stimulated and his anxiety level is lowered.
Remember, a tired (exercized) dog is a happy (less anxious) dog!