A member asked:

If you have a canker sore in your mouth and you give someone oral is it contagious to them?

4 doctors weighed in across 2 answers
Dr. John Chiu answered

Unlikely: I have never heard of a canker sore being transmitted from one person to another.

Answered 8/18/2013

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Don't do it: Yes yes yes!, viral and bacterial sores in your mouth are very contagious so take a break from any oral contact with others.

Answered 8/23/2013

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