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Lifespan’s A - Z Health Information Library |
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Fever blisters and canker soresAlternative NamesCanker sores and fever blisters InformationQuestion: Are fever blisters and canker sores the same thing? Answer: No. Canker sores occur only inside the mouth and are not contagious. They sometimes occur as a result of trauma (biting the inside of the lip, burning the mouth with hot food), but may also occur without any known reason. Fever blisters or cold sores are caused by herpes simplex virus type 1 and are very contagious. Fever blisters often come back in the same location. ReferencesGonsalves WC, Chi AC, Neville BW. Common oral lesions. Part I. Superficial mucosal lesions. Am Fam Physician. 2007;75(4):501-507.Review Date: 2/1/2009
Reviewed By: Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. The information provided herein should not be used during any
medical emergency or for the diagnosis or treatment of any medical
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