Hi Ethel, it’s good that your vet has ruled out more common causes of excessive licking as allergies, nail problems and infections.
If it is nerves or anxiety, then there are a number of things you can do to help her. One is to try and identify if there’s one particular time or circumstance where she licks most often, and do something to change her environment during those times. For example, if she licks most often when she’s alone during the day, perhaps she’d benefit from a play date or doggie day care center. Another thing you can do is give her more exercise as that releases all those “feel good chemicals” that can help her relax and feel less anxious. A third option is to use anti-anxiety medication under the supervision of your vet or veterinary behaviorist. The behaviorist can also help with a training program to help her with her anxiety.
Behavioral problems can take time and effort to manage but it’s worth it both for her and for you – it’s obviously causing you great concern. There’s more information on this type of compulsive behavior in dogs at this link - Obsessive Compulsive Disorder in Pets.
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