SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Not for use in Television.
Oral ulcer. Close-up of the mouth of a man with an oral ulcer, with the inside of the mouth being examined with the use of a retractor to keep the mouth open. Ulcers are open wounds or lesions which become inflamed and fail to heal properly. Possible causes of the ulcer include smoking, alcohol use, and betel nut use. This man also has dental caries (tooth decay). Photographed in India.
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