Sadiaabout 3 years ago

Canker Sores

Canker sores are small shallow ulcers that occur in the lining of the mouth. The medical term for canker sores is “aphthous ulcers.” Canker sores start as white to yellowish ulcers that are surrounded by redness. They're usually very small (less than 1 mm) but may enlarge to ½ to 1 inch in diameter.