What Are the Treatments for Canker Sores Inside the Mouth?
A canker sore is an open sore in the mouth. The primary symptoms is pain. The cause of canker sores is unknown, according to Medline Plus, a website of the National Institutes of Health. Possible causes of canker sore include hormonal changes, a virus, immune system problems and stress. Further, women are more likely to experience canker sores than to men, according to Medline Plus.