programming forums Java Java JSRs Mobile Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums. this forum made possible by our volunteer staff, including ...
What are canker sores? Canker sores (also called aphthous ulcers) are different than fever blisters. They are small, red or white, shallow ulcers occurring on the tongue, soft palate, or inside the lips and cheeks; they do not occur in the roof of the mouth or the gums. They are quite painful, and usually last 5-10 days.
Canker sores are ulcers that usually appear on the base of your gums, tongue, the roof of your mouth and the inner surface of your lips and cheeks. Canker sores start as painful, red bumps, then develop into open ulcers with a yellow or white middle. The areas around canker sores are bright red.