Lick sores or lick granulomas can develop in dogs who may constantly lick a particular area (most commonly the lower legs and feet) so much so that it develops into a sore or swelling. Lick granulomas usually develop in response to something that has irritated your dog such as an insect bite, allergies, or entrapped foreign body. Stressful events, boredom, and sudden environmental changes can also cause lick granulomas. Even if the inciting cause or stressful event is long gone, some dogs may continue to lick obsessively at the site. If your dog does not show improvement with basic first aid, it is important to seek veterinary attention as there could be a secondary skin infection and/or underlying medical condition going on.