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Commonly called canker sores, mouth Ulcers are Painful, crater-like lesions in the mucous membrane lining of the mouth and tongue. They are typically small and red in appearance, or may be covered with a thin membrane. They usually last for about a week, and often recur.
Mouth Ulcers may be caused by an immune reaction (to a virus), physical trauma (like biting the cheek), food sensitivity, or nutrient deficiency. Some reports indicate that the consumption of nitrites (in smoked or preserved foods) may be a contributing factor, and could eventually increase the risk of oesophageal cancer.
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