Something like that has happened to one of my dogs. They said it was allergies, but like always they couldn't find ne thing. But what we had to do is change her diet. She use to get a meat base food but now we have to get a lamb and rice type. They also have sprays you can buy that pervent licking and itch.

St.Jon PETTRELIEF.
*Provides relief from itching.
*Helps Speed healing
For hot spots, scrapes & abrasions, flea bite& ~*allergic dermatitis*~.