Are canker sores of viral origin? Bacterial?

The causes of canker sores are still widely misunderstood. However, specialists agree that their origins are neither viral (as herpes) nor bacterial. On the other hand aphthous lesions can cause secondary infection, extending the length of crisis and increasing pain.

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In the USA, 4 million people have canker sores more than once a month

Tip of the day:

Check that your toothpaste doesn't contain a substance likely to cause canker sores