Fibromas are often caused by:
If one area of your mouth is repeatedly injured, scar tissue can form, and the underlying normal tissue may be stimulated to grow.
Fibromas can develop over weeks, months or years.
People with Cowden's syndrome — a genetic disorder that may lead to skin lesions and increases the risks of breast and thyroid cancers — also get oral fibromas. In this case, they are not related to trauma.
When fibromas are removed, the tissue is sent to a laboratory for a biopsy. In some cases — particularly if you drink or smoke, or if the color of the fibroma is different than usual — your dentist may biopsy the tissue to rule out oral cancer. Fibromas themselves are not cancerous and are not known to become cancerous over time.
