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What’s in a cold sore? Causes, treatments, advice

woman with cold sore on lip looking in mirrorA cold sore is a painful blister that forms on or around your lip, or sometimes around your nose or eyes. It normally starts with a tingling sensation or itch, followed by painful blisters that may eventually break and ooze infectious liquid.

Though unpleasant, cold sores usually heal on their own within 7-10 days. Read in full

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