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Alternative names Return to top
Canker sores and fever blistersInformation Return to top
Question:
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 spontaneously.
Fever blisters or cold sores are caused by herpes simplex virus type 1 and are very contagious. Fever blisters often recur in the same location.
Update Date: 5/17/2003 Updated by: Bridget Martell, M.D., Department of Internal Medicine, Albert Einstein College of Medicine, New York, NY. Review provided by VeriMed Healthcare Network.
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Page last updated: 28 October 2004 |