Canker or cold sores: Cold sores are caused by HSV (virus) and occur on the outsides of the lips. Canker sores are on the inside and are more due to stress and not caused by a virus. Treatment depends on which you are dealing with.
Answered 11/28/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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