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Are canker sores contagious? No. They are not. BUT you need to be sure your sore is not a cold sore which are highly contagious. Here are the difference between a canker sore and a cold sore.
Canker sores are not contagious. This is because, they are not caused by an infection. Canker sores are due to a breakdown in the lining or mucous covering of the mouth, tongue or gum.
People ask this question if canker sores are contagious because they are often confused with cold sores.
Canker sores and cold sores are two completely different conditions.
A cold sore is a bump on the outside surface of the mouth (usually on the lip) caused by the herpes virus. It is also called a herpes simplex infection or herpes type 1 infection.
Is it safe to kiss someone with a canker sore? Yes. It is.
This is because, as mentioned above, it is not an infection. So you can not get canker sore from kissing someone with canker sore and you cannot transfer your canker sore to someone else by contact or kissing or any other means.
It is important to know that kissing someone with canker sore in your mouth could cause you some pain. So if you are wondering what happens if you kiss someone with a canker sore, you now know that other than the person perhaps having more pain from the kissing, he or she cannot spread canker sore to you.
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