Aphthous ulcer
A small sensitive painful ulcer crater in the lining of the mouth. Commonly called a canker sore. Aphthous ulcers are one of the most common problems that occur in the mouth. About 20% of the population (1 in 5 people) have aphthous ulcers at any given time. Aphthous ulcers typically last for 10-14 days and they heal without leaving a scar. There are many possible causes of aphthous ulcers. Often the cause is unknown. For a full article, see Canker sores (Aphthous ulcers).
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a small ulcer, occurring singly or in groups in the mouth as white or red spots; their cause is unknown. Treatment is with topical tetracycline or topical corticosteroids.
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the ulcerative lesion on the oral mucosa seen in recurrent aphthous stomatitis.
Medical dictionary.
2011.