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Cold sores

Cold sores

Cold sores, sometimes called fever blisters, are clusters of small blisters on the lip and outer edge of the mouth. Cold sores are caused by the herpes simplex virus.

Once a person is infected with the herpes simplex virus, cold sores can occur repeatedly. The sores often weep a clear fluid and form scabs after a few days. A cold sore typically lasts 8 to 10 days and is contagious until the blister is completely crusted over.

Cold sores usually heal on their own. Medications are available for more rapid healing, reducing pain, and reducing the severity of future outbreaks.

Author Maria G. Essig, MS, ELS
Editor Susan Van Houten, RN, BSN, MBA
Associate Editor Michele Cronen
Primary Medical Reviewer Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer Alexander H. Murray, MD, FRCPC - Dermatology
Last Updated March 13, 2008




Author: Maria G. Essig, MS, ELS Last Updated: March 13, 2008
Medical Review: Kathleen Romito, MD - Family Medicine
Alexander H. Murray, MD, FRCPC - Dermatology


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