All of the following are potential oral manifestations of betel nut EXCEPT:

Xerostomia (dry mouth) is NOT associated with betel nut chewing. In fact, betel nut stimulates salivation. Betel nut associations: extrinsic staining (red/brown), oral submucous fibrosis, squamous cell carcinoma, increased plaque/calculus, gingival disease. Xerostomia is caused by medication (antihistamines, antidepressants, etc.), Sjögren's, or radiation.