A Answers (3)
Aphthous stomatitis, or canker sores that form inside the mouth, usually go away within a week or two. If you are concerned about a canker sore outbreak, you can discuss it with either your doctor or dentist. While mild cases usually don’t require treatment, you may need medical care if the sores are especially large, painful, or persistent.
American Dental Association answered
Canker sores usually heal on their own within a week or two. There are also over-the-counter remedies available. However, if a canker sore isn’t healing or you’re concerned about a canker sore, talk to your doctor or dentist.
Honor Society of Nursing (STTI) answered
You should talk to your doctor or dentist about your aphthous stomatitis (canker sore) symptoms if you have not previously had one. If you have had canker sores in the past, you will recognize the symptoms and most likely be able to treat it yourself. If a canker sore is long-lasting (more than two weeks), be sure to let your doctor or dentist know. It could signal another health condition.