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Canker Sore: First Aid Management

A canker sore is an often painful, small round to oval shaped open sore found inside the oral cavity. These sores appear as a white or yellow ulcer in the base of the gums, inside the cheek, under the tongue, soft palate or in the back of the throat. A canker sore usually makes eating, and at times talking, difficult for an individual. The non-contagious canker sore should not be confused with the highly co ...

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