An irritation fibroma is a fibrous nodule of the

oral cavity In animal anatomy, the mouth, also known as the oral cavity, or in Latin cavum oris, is the opening through which many animals take in food and issue vocal sounds. It is also the cavity lying at the upper end of the alimentary canal, bounded on ...

, often considered to be a reactive hyperplasia secondary to trauma or other local sources of irritation.

References

{{disease-stub Oral mucosal pathology