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    5. What are cold sores on your lip, caused from?
    What are cold sores on your lip, caused from?

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    0  Views: 442 Answers: 1 Posted: 12 years ago
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      Cold sores are caused by herpes simplex virus type 1, which passes through saliva or by skin contact. In some people, this virus stays inactive, and in others in may become active for different periods of time, within varying time intervals. Mental or emotional stress may lead to cold sore outbreak.

      12 years ago. Rating: 2
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