Canker sores

Canker sores

About Canker sores

An aphthous ulcer or mouth ulcer also known as a canker sore, is a type of mouth ulcer that presents as a painful open sore inside the mouth or upper throat characterized by a break in the mucous membrane. Its cause is unknown, but they are not contagious. The condition is also known as aphthous stomatitis (stomatitis is inflammation of the mucous lining), and alternatively as Sutton's Disease, especially in the case of major, multiple, or recurring ulcers. The term aphtha means ulcer; it has been used for many years to describe areas of ulceration on mucous membranes. Therefore, the term aphthous ulcer is redundant and the term aphthous stomatitis is preferred.

Contributions by Epeefleche, Davidruben, and Dozenist.

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