If you've discovered a small, fluid-filled bump inside your mouth, it could be a mucocele, which is a harmless cyst caused by ...

Lesions or lumps that appear on your lips or inside your mouth and don't go away ... pimples on the lip can appear as a fluid-filled bump with a visible head or as a raised, inflamed area.

The result is a small, tender, raised bump on the skin that's sometimes filled with pus. A pimple on your lip can be uncomfortable. A dermatologist (who specializes in skin, hair, and nails ...

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 ...