Quantcast This image displays white-to-yellow lesions typical of apthous ulcers. This image displays several small erosions and aphthous ulcers on the lower lip. This image display the grayish-white color of an aphthous ulcer. This canker sore (aphthous ulcer) has a typical red border and white center. As displayed in this image, aphthous ulcers can be large, deep, and painful. 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):
Information for adults

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Picture of Canker Sore (Aphthous Ulcer): This image displays white-to-yellow lesions typical of apthous ulcers. Divider line
This image displays white-to-yellow lesions typical of apthous ulcers.
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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 episodes.
  • 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: 29 Feb 2008

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