A whitish hyperkeratosis in the buccal plane of the cheek mixed with tattered patches and areas of ulceration and erythema refer to the clinical picture of morsicatio buccarum. It represents a more distinctive form of linea alba buccalis and is also caused by increased cheek biting and/or sucking, often times combined with an often psychological background as the result of stress or anxiety. The lesions are bilateral and can be accompanied by the same condition on the lateral border of the tongue and/or on the lips.
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