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Lumps in the mouth from irritation (oral fibroma)

Also called: Oral fibroma, irritation fibroma, bite fibroma, denture fibroma

A firm, smooth, painless bump inside the mouth, usually on the cheek, lip, or tongue where it gets bitten or rubbed. It's harmless and can be removed if it bothers you.

FeelsFirm, smooth, same color as the mouth
CauseRepeated rubbing or biting
TreatmentSimple removal

Overview

It won't go away on its own because it's made of scar-like tissue.

A dentist sends it for testing after removal to be sure.

Symptoms

Common signs:

  • Lump in the mouth

Less common

  • Bump that gets bitten

When to get medical care

Call 911This isn't an emergency by itself. Call 911 for trouble breathing, chest pain, or fainting.
Get care todayA bump that bleeds a lot or grows quickly.
See a doctor soonAny mouth lump lasting more than 2 weeks.

Causes

Rubbing or biting.

Does it spread or run in families?

  • It isn't contagious. You can't catch it from someone else.

Who is more likely to get it

  • Denture wearers
  • Cheek biters

Possible complications

Diagnosis

A dentist looks at the bump.

Questions you may be asked

  • Cheek biting, dentures, sharp teeth

The exam

Mouth exam.

Tests

Tests, if needed:

  • Biopsy: After removal.

Treatment

Remove the cause of irritation.

Self-care

  • Avoid biting the area
  • Have rough teeth or dentures smoothed

A quick removal in the office.

Prevention

To prevent it:

  • Well-fitting dentures

Which doctor treats this

  • Start with your primary care provider (family doctor or internist).
  • They may send you to a dentist or an ENT doctor (ear, nose, and throat doctor).

Pregnancy and breastfeeding

  • If you're pregnant or planning to be, tell your prenatal provider about this condition.
  • Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
  • Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
  • Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.

Outlook

Harmless.

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Lumps in the mouth from irritation (oral fibroma)

Sources

Last updated 2026-11-12.