Mouth ulcers, also known as canker sores, are small, painful lesions that develop in the soft tissues of the mouth, including ...

A mouth ulcer is a small, painful lesion that forms inside the mouth. They can appear as round or oval sores with a white, yellow, or gray center and a red border. Common locations for mouth ...

Some people have perceptions of certain diseases that they believe only affect some groups of people. Think about the way some people talk about head lice. While anyone who has dealt with pesky ...