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cold sores

cold sores, sometimes called fever blisters, are groups of small blisters on the lip and around the mouth. the skin around the blisters is often red, swollen, and sore. the blisters may break open, leak a clear fluid, and then scab over after a few days. they usually heal in 7 to 10 days.

cold sores are most contagious until the blisters are completely healed.

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this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

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