My WebMD Sign In, Sign Up

Ask Your Question

WebMD Answers

120 Characters remaining
120 Characters remaining
  • First, try and keep your question as short as possible.
  • Include specific words that will help us identify questions that may already have your answer.
  • If you don't find your answer, you can post your question to WebMD Experts and Contributors.

Close

Posted: | Report This Report Question |
Q.

Are canker sores contagious?

Related Topics: Canker Sore
 

Answers From Experts & Organizations (1)

8,020 Answers
265,171 Helpful Votes
314 Followers
A.

Canker sores are not contagious.

Nobody knows what exactly causes canker sores, but many factors may contribute to their development, such as certain medications, trauma to the mouth, poor nutrition, stress, bacteria or viruses, lack of sleep, sudden weight loss, and certain foods such as potatoes, citrus fruits, coffee, chocolate, cheese, and nuts.

Canker sores may also be related to a temporarily reduced immune system because of a cold or flu, hormonal changes, mechanical irritation, or low levels of vitamin B12 or folate. Even biting the inside of the cheek or chewing a sharp piece of food can trigger a canker sore.

Canker sores may result from a genetic predisposition and are considered an autoimmune disease.

About 20% people in the U.S. will have canker sores at some point during their lifetime -- women more often than men.

This answer should not be considered medical advice...down arrowThis answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.up arrow

Posted:
| Report This Report Answer
Archived: March 20, 2014

Was this helpful?

YesNo

Thanks for your feedback.

391 of 422 found this helpful
Read the Original Article: Stomatitis
 
 

Next Question: