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What is a cold sore?

Cold sores, sometimes referred to as oral herpes, are small blisters or lesions on the mouth, which are caused by the herpes simplex virus (HSV).

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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: 4.0 out of 5
Votes: 950 (Click smiley face below to rate)
Category: Genital herpes

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