Fibromas may develop because of constant irritation of the lips, the inside of the cheeks, or the tongue. Irritation can be caused by:
If one area of your mouth is injured over and over, scar tissue can form. This also may stimulate the underlying normal tissue to grow.
Fibromas can develop over weeks, months or years.
When fibromas are removed, the tissue is sent to a laboratory for a biopsy. If you drink or smoke, your dentist is likely to order a biopsy to rule out oral cancer. Another reason to do a biopsy is if the fibroma has an unusual color. Fibromas are not known to become cancerous over time.