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)  Teen information

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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Who's At Risk
Anyone can get canker sores, though it seems that, even among healthy populations, some people are more prone to them. There may also be a tendency to get canker sores that runs in families. The most common age groups are older children, teens, and adults. Anyone with a weakened immune system will be more likely to develop mouth ulcers.
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Last Modified: 22 Dec 2008
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