5 doctors weighed in:

Are canker sores contagious?

5 doctors weighed in
Dr. Allen Seely
General Practice
2 doctors agree

In brief: NOT contagious

'cold sores' are caused by virus=herpes simplex.
Canker sores are associated with dental work, extra brushing, mouth injuries, spicy or acidic foods. Toothpastes containing sodium lauryl sulfate have been implicated. Canker sores may also occur in immunosuppressed patients(or hiv). Also noted are food sensitivities: chocolate, coffee, strawberries, nuts, cheese and acidic foods, e.g. Pineapple.

In brief: NOT contagious

'cold sores' are caused by virus=herpes simplex.
Canker sores are associated with dental work, extra brushing, mouth injuries, spicy or acidic foods. Toothpastes containing sodium lauryl sulfate have been implicated. Canker sores may also occur in immunosuppressed patients(or hiv). Also noted are food sensitivities: chocolate, coffee, strawberries, nuts, cheese and acidic foods, e.g. Pineapple.
Dr. Allen Seely
Dr. Allen Seely
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Dr. Alex Shvartsman
Dentistry - Cosmetic

In brief: Probably

They are probably viral in nature, .

In brief: Probably

They are probably viral in nature, .
Dr. Alex Shvartsman
Dr. Alex Shvartsman
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In brief: No, they are not.

Recurrent canker sores, also known as aphthous ulcers, are not contagious.
The cause is often unknown- perhaps food allergies, trauma, an immunologic reaction, nutritional deficiencies, or hormonal changes. They are usually on the tissues of the mouth not attached firmly to the bone such as gum, lips, and the tongue.

In brief: No, they are not.

Recurrent canker sores, also known as aphthous ulcers, are not contagious.
The cause is often unknown- perhaps food allergies, trauma, an immunologic reaction, nutritional deficiencies, or hormonal changes. They are usually on the tissues of the mouth not attached firmly to the bone such as gum, lips, and the tongue.
Dr. Jennifer Holtzman
Dr. Jennifer Holtzman
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