Here is an overview of the common causes: Transient lingual papillitis and canker sores can occur due to injury or irritation of the tongue, gums, or mouth. Common causes of these bumps include ...

Pollack says they look like blisters – red, raised, and painful bumps. They typically occur outside of the mouth on and around the lips, but it is possible for them to occur on your tongue ...

If you notice a painful bump on the roof of your mouth, it could be an abscess—an infection that forms when bacteria invade ...