Excessive licking of floors, furniture, and people can be behavioral, but widespread licking can also be a sign of nausea, reflux or another stomach problem. Anxiety, boredom, attention-seeking, pain, allergies, dental discomfort, and compulsive behavior are other possibilities.
Start with these steps:
Seek prompt veterinary care if the licking is accompanied by gulping, drooling, vomiting, diarrhea, appetite changes, a swollen or painful abdomen, restlessness, eating nonfood objects, weakness, or possible exposure to a chemical or toxin. Do not use bitter spray on large areas until a medical cause has been ruled out; it may merely redirect the behavior elsewhere.