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A member asked:
What are the causes of a fever blister or cold sore?
A doctor has provided 1 answer
Virus: Cold sores are normally caused by herpes simplex i & most people have this virus living in the nerves of the mouth. Some rarely have outbreaks while others have them more frequently - usually when under stress. Your md or dentist can prescribe medication to help them resolve faster & reduce the outbreaks.
Answered 12/9/2013
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