Popular questions...


What can trigger a cold sore?

An outbreak of cold sores can be caused by stress, sunlight or wind exposure, having a cold, the flu or another infection, and menstruation.

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About this article

Author: Dr Joanne Van der Velden PhD, BSc (Hons)
First answered: 19 Sep 2014
Last reviewed: 19 May 2018
Rating: 4.9 out of 5
Votes: 948 (Click smiley face below to rate)
Category: Genital herpes


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