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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Signs and Symptoms
Minor aphthae are single or multiple lesions, 1.0 cm or less in diameter.

Major aphthae are deep ulcers greater than 2.0 cm in diameter. 

Herpetiform aphthae appear as multiple ulcerations.

The most common locations of canker sores are inside the mouth or lips or on the tongue. The genitals may also be affected. The sores can have a white, gray, or yellow base.
Last Modified: 25 Aug 2008

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