Mouth ulcer

Diagramatic representation of mucosal erosion (left), excoriation (center), and ulceration (right)

A small ulcer on the lower labial frenum.

An aphthous ulcer on the labial mucosa. Note erythematous halo surrounding lesion.

A mouth ulcer (also termed an oral ulcer, or a mucosal ulcer) is an ulcer that occurs on the mucous membrane of the oral cavity. Mouth ulcers are very common, occurring in association with many diseases and by many different mechanisms, but usually there is no serious underlying cause.

单词	Oral ulceration
释义	Oral ulceration 英语百科 Mouth ulcer A mouth ulcer (also termed an oral ulcer, or a mucosal ulcer) is an ulcer that occurs on the mucous membrane of the oral cavity. Mouth ulcers are very common, occurring in association with many diseases and by many different mechanisms, but usually there is no serious underlying cause.
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Oral ulceration

Mouth ulcer