Canker sores, also called aphthous ulcers, are small shallow ulcers that occur in the lining of your mouth. “They measure ...

Abscess If you notice a painful bump on the roof of your mouth, it could be an abscess—an infection that forms when bacteria invade the soft tissues. According to Dr. Ross, abscesses often develop due ...

Canker sores are small, painful reddish lesions in the mouth that have a white or yellow center. Some causes of canker sores are spicy/acidic foods, vitamin deficiencies, braces, and stress.

Canker sores Canker sores are white lesions inside the mouth that are typically painful, says Sage Pollack, DMD, dentist and founder of Dentistry of Colorado. They might appear as a bump or as a ...