Definition of Canker sore

Reviewed on 6/3/2021

Canker sore: A common small, frequently painful and sensitive crater in the lining of the mouth. Also known as aphthous ulcer. Sores typically last for 10 to 14 days and generally heal without scarring.

SLIDESHOW

Mouth Problems: TMJ, Canker Sores, Painful Gums and More See Slideshow

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