There are aphthous ulcers (canker sores) on the right of the image at the corner of the mouth, just below the tongue, and also a shallow ulcer on the lower lip on the left. This image displays a shallow ulcer inside the mouth, typical of an aphthous ulcer (canker sore). This image displays a shallow aphthous ulcer (canker sore). This image displays multiple aphthae (canker sores), lesions with a white center and red surround. This image displays a larger-than-usual aphtha (canker sore), with the typical white erosion. This image displays a large, healing aphtha (canker sore) on the lower lip.
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Canker Sore (Aphthous Ulcer):
A parent's guide to condition and treatment information

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Picture of Canker Sore (Aphthous Ulcer): There are aphthous ulcers (canker sores) on the right of the image at the corner of the mouth, just below the tongue, and also a shallow ulcer on the lower lip on the left. Divider line
There are aphthous ulcers (canker sores) on the right of the image at the corner of the mouth, just below the tongue, and also a shallow ulcer on the lower lip on the left.
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Self-Care Guidelines
None usually necessary except gentle oral care. There is no cure for canker sores, but the following measures may help relieve the pain associated with them:
  • Apply protective pastes to form a barrier over the ulcer.
  • Apply local anesthetics (benzocaine, lidocaine) to help numb the area.
  • Use antibacterial mouthwashes.
  • Avoid products or foods that seem to trigger episodes.
  • Maintain a good diet or take vitamins.
  • Get enough sleep and reduce stress.
When to Seek Medical Care
See your child's doctor for evaluation if canker sores do not heal, occur frequently, or are extremely uncomfortable or painful.
Last Modified: 29 Jan 2008

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