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Canker sores, or aphthous ulcers, are ulcerations that occur inside the mouth along the mucosa. They are found on the inner cheeks and lower lip as well as on the tongue, palate, and the covering of the gums. Canker sores are small, round, and painful. They are gray in color with a distinct edge. They are not contagious and are caused by stress or trauma to the area.

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Archived: March 20, 2014

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Read the Original Article: Herpes Simplex Infections (Cold Sores, Non-Genital)