What is a canker sore caused by?
Categorized: Conditions & Illness Source: Canker sore: Causes – MayoClinic.com | www.mayoclinic.com Description: contributes to outbreaks, even in a single individual. These factors include: * A faulty immune system that attacks healthy cells in your mouth instead of pathogens such as viruses and bacteria * A minor injury to your mouth from dental work, overzealous Answered: Jun 29 2009, 10:32am Answered by: Cheryl W.
