Quantcast This image displays several small erosions and aphthous ulcers on the lower lip. This image displays a shallow aphthous ulcer (canker sore). As displayed in this image, aphthous ulcers typically have a white or yellow color. This image displays a tongue with three small ulcers from aphthae. This image displays an unusually large amount of canker sores of the lower inner lip. This image displays a large, healing aphtha (canker sore) on the lower lip.
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Canker Sore (Aphthous Ulcer):
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Picture of Canker Sore (Aphthous Ulcer): This image displays several small erosions and aphthous ulcers on the lower lip. Divider line
This image displays several small erosions and aphthous ulcers on the lower lip.
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Self-Care Guidelines
There is no cure for canker sores. Most heal in 1–2 weeks, but the following measures may help relieve the pain:
  • Apply protective pastes to form a barrier over the sore.
  • Apply local anesthetics (benzocaine, lidocaine) to help numb the area.
  • Use antibacterial mouthwashes.
  • Avoid products or foods that seem to trigger canker sores.
  • Maintain a good diet or take vitamins.
  • Get enough sleep and reduce stress.
When to Seek Medical Care
See your doctor if canker sores do not heal, occur frequently, or if you have extreme discomfort or pain.
Last Modified: 25 Aug 2008

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