Not contagious: Canker sores are not pleasant and can be painful and uncomfortable, they are not contagious. Do not confuse with a cold sore, which is normally on the outside of the mouth and usually are highly contagious.
Answered 10/2/2016
3.7k views
Not: Canker sores are not contagious . Cold sores caused by HSV I are not contagious either since most of us have already been infected with this virus but only a small % people end up with cold sores.
Answered 10/4/2016
3.7k views
3 doctors weighed in across 2 answers
11 doctors weighed in across 4 answers
A doctor has provided 1 answer
4 doctors weighed in across 3 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question