http://www.oramd.com/cold-sore-canker-sore.htm Cold Sore and Canker Sores Facts You Should Know. Canker sores commonly occur only in the mouth, and are often the result of poor dental hygiene and [...]

http://www.oramd.com/cold-sore-canker-sore.htm Cold Sore and Canker Sores Facts You Should Know. Canker sores commonly occur only in the mouth, and are often the result of poor dental hygiene and other mouth irritations, but not by herpes.

Canker sores are not cold sores and have no link to cold sores and there is no medication to treat canker sores. Cankers sores, unlike cold sores, will usually go away on their own within one to three weeks.