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What Causes Cold Sores?

What Causes Cold Sores?

Cold sores start out with a tingling sensation on the firmer tissues of the lip, outside of the cheeks, corners of the mouth, and on the tongue.  Small blisters then form that are yellowish in color with red raised borders.  Unlike other types of mouth sores, cold sores are contagious! Cold sores are actually a form of the herpes virus…

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