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Canker Sore Learning Center
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A canker sore is a painful, open sore in the mouth. Canker sores are white or yellow and surrounded by a bright red area. They are benign (not cancer. See also: Herpes, Fever blisters and Canker sores
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Canker sores are small sores or ulcers that appear inside the mouth. They are painful, self-healing, and can recur.
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Question: Are fever blisters and canker sores the same thing? Answer: No. Canker sores occur only inside the mouth and are not contagious. They sometimes occur as a result of trauma (biting the inside of the lip, burning the mouth with hot food), ...
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Canker sores are small sores or ulcers that appear inside the mouth. They are painful and often recur from once every few years to almost continually. Canker sores are known medically as apthous ulcers or apthous stomatitis.
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Canker sores (aphthous ulcers) are small shallow sores or ulcers that appear inside the lips, inside the cheeks, or on the gums. They begin as small, reddish swellings. Then they burst, and the rupture sores are covered with a white or yellow memb...
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