stomatitis characterized by the repeated formation of benign and non-contagious mouth ulcers From Wikipedia, the free encyclopedia
A canker sore is a kind of mouth ulcer. These ulcers occur periodically, and heal completely. They are not contagious. The medical term for them is Aphthous stomatitis or recurrent aphthous stomatitis (RAS). The condition is very common. It affects about 20% of the general population. It often starts in childhood or adolescence, and lasts for several years, before it slowly disappears. There is no cure, but there are drugs that are mostly given to manage pain.
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