Cold Sore : Causes

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Causes could include:
Herpes labialis is a common disease caused by infection of the mouth area with herpes simplex virus type 1. Most people in the United States are infected with the type 1 virus by the age of 20 The initial infection may cause no symptoms or mouth u...
Source:ADAM
Date:May 21, 2008
A cold sore is a clear, fluid-filled blister, which often appears on the lips or nose. Cold sores, also referred to as fever blisters, are caused by a viral infection , herpes simplex virus Type 1 (HSV-1).
Source:Gale Encyclopedia of Nursing and Allied Health
A cold sore is a fluid-filled blister which usually appears at the edge of the lips. Cold sores are caused by a herpes simplex virus infection.
Source:Gale Encyclopedia of Medicine
Cold sores are small red blisters, filled with clear fluid, that form on the lip and around the mouth. Rarely, they form on the roof of the mouth. Cold sores are caused by the herpes simplex virus type 1 (HSV-1), which lives inside nerve tissue. D...
Source:Gale Encyclopedia of Children's Health
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