http://www.treatingacoldsore.net/what-causes-a-cold-sore-to-break-out.html Remedies and treatments to relieve your discomfort. Tue, 07 Feb 2012 13:28:27 +0000 http://wordpress.org/?v=2.7 hourly 1 http://www.treatingacoldsore.net/what-causes-a-cold-sore-to-break-out.html/comment-page-1#comment-928 ilse72 Thu, 29 Jul 2010 22:25:07 +0000 http://www.treatingacoldsore.net/what-causes-a-cold-sore-to-break-out.html#comment-928 Cold sores are caused by the herpes simplex virus (type 1). The original infection began via contact with a person who had an active cold sore or through sharing their utensils, towels or facial razor. The virus comes (active phase) and goes (dormant phase). Things that can make the virus come out of dormancy are stress, fever, menstruation or sun exposure. Cold sores are caused by the herpes simplex virus (type 1). The original infection began via contact with a person who had an active cold sore or through sharing their utensils, towels or facial razor. The virus comes (active phase) and goes (dormant phase). Things that can make the virus come out of dormancy are stress, fever, menstruation or sun exposure.

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