A cold sore is an irritating red blister that usually develops on the face, normally around the edges of the mouth. Apart from being unattractive, they can be really painful too, and if the outbreak is bad, they can make …
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A cold sore is an irritating red blister that usually develops on the face, normally around the edges of the mouth. Apart from being unattractive, they can be really painful too, and if the outbreak is bad, they can make …