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Is aphthous stomatitis (canker sore) serious?

Aphthous stomatitis (canker sore) is not usually a serious condition. Most outbreaks disappear on their own within two weeks. However, a doctor or dentist should examine a sore that is larger, more long-lasting, or more painful than usual. This may indicate an underlying health condition that needs to be treated.

The condition called aphthous stomatitis -- better known as a canker sore -- is usually not serious. These minor sores, which can turn up inside your lip, on the inner cheek, or elsewhere in your mouth, almost always go away on their own within a week or two. However, if a canker sore is very painful, large, or doesn't go away, call your doctor.
Canker sores usually heal on their own after a week or two and are usually not serious. Your dentist should examine any mouth sore that lasts a week or longer. This could be the symptom of a disease or disorder.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.