A canker sore is a painful, open sore in the mouth. Canker sores are white or yellow and surrounded by a bright red area. They are not cancerous.
A canker sore is not the same as a
Aphthous ulcer; Ulcer - aphthous
Canker sores are a common form of
Canker sores may also be linked to problems with the body's immune...Read more
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