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As well as numbness in the mouth other signs that can arise, possibly indicating something sinister include: Nagging mouth pain Bleeding sore in the mouth that wont heal and lasts for more than two weeks Swelling in the neck that lasts for more than two weeks An area in the mouth that becomes discoloured and stays that way A lump or thickening in the cheek that doesnt go away A constant feeling of something caught in your throat or a change in your voice that lasts longer than two weeks

Why Do Mouth Ulcers Happen

Br Dent J 199 , 565572 (2005)