Having an upper : Respiratory infection (which could cause a runny nose) may trigger cold sores. Triggers for cold sores can include illness, stress, fatigue, becoming physically cold, dry air, uv rays (sun), mouth trauma or one's period.
Answered 11/24/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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