Illustration copyright 2002 Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com
Canker sores (aphthous stomatitis) are painful white ulcers in the mouth. They appear most often on the tongue, inside the cheeks, and inside the lips. Unlike cold sores, canker sores are not contagious, but in some people they keep coming back. Canker sores cause pain that may make it difficult to speak or eat.
Last Revised: August 31, 2010
Author: Healthwise Staff
Medical Review: Kathleen Romito, MD - Family Medicine & Arden Christen, DDS, MSD, MA, FACD - Dentistry
To learn more visit Healthwise.org
© 1995-2012 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.