MummuM answered Monday October 9 2006, 12:56 pm: What are cold sores?: A localized collection of clear fluid causing elevation of the skin, separating it into an upper and lower layer. Breakdown of a blister produces an ulcer. Typically associated with HSV-1 appearing on the face, lips, and inside the mouth as blisters or small ulcerations. For more imformation, I suggest checking out the following site: [Link](Mouse over link to see full location) It explains what a cold sore is and how it is formed. [ MummuM's advice column | Ask MummuM A Question ]
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