Canker Sore
Canker Sore
This photo shows a minor aphthous ulcer (commonly known as a canker sore) on the inside of the lip. The ulcer shown is larger than a typical canker sore.
R P. MARAZZI/SCIENCE PHOTO LIBRARY
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This photo shows a minor aphthous ulcer (commonly known as a canker sore) on the inside of the lip. The ulcer shown is larger than a typical canker sore.
R P. MARAZZI/SCIENCE PHOTO LIBRARY