Most usually, the lesions are on the buccal mucosa, but sometimes on the labial mucosa, alveolar ridge, floor of the mouth, ventral surface of the tongue or soft palate. The gingival margin and dorsum of the tongue are almost never affected.
Lesions typically appear on the buccal mucosa, although they can also be found on other areas like the labial mucosa, alveolar ridge, floor of the mouth, tongue's ventral surface, or soft palate. The gingival margin and dorsum of the tongue are rarely affected.