Monday, May 28, 2012
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Canker Sore Learning Center

 

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 benign (not cancer. See also: Herpes, Fever blisters and Canker sores

 
 

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Canker Sore Causes

  • No known cause
 

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