Looks like inflammation that needs regular cleaning and possibly prescribed medication. We call it Bully acne. It's common in some bullies and not so much in others. Droolers and diggers will get it from creating an environment prone to infection. Plastic water and food bowls are known to stir things up, too. Stick with Stainless or glazed ceramic if not doing so already. Clean clean clean for the next week or so and if not improving, see your Vet.