A mouth sore is enough to make your appetite go for a toss, right? Canker sores are painful sores that usually appear inside your mouth, at the base of your gums. While these are not contagious, they ...

The NHS says that mouth ulcers are common, and most of them are harmless. But sometimes, they say, ulcers ― small, usually circular sores that form on the inside of your lip, inner cheek ...