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How do canker sores appear in the mouth?

April 26, 2017appear Canker mouth Sores

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How do canker sores appear in the mouth?

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Canker sores can appear as small (ranges from 3 mm to 3 cm in diameter) gray or white round lesions surrounded by a red border. Its appearance is due to an actual destruction of the mucosa by the immune system, primarily T lymphocytes. These lesions can appear on the inside of the cheek, floor of the mouth (under the tongue), roof of the mouth (palate), or on the tongue only.