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Oral cancer symptoms. Some of the most common oral cancer symptoms and signs include: 1  Persistent mouth sore: A sore in the mouth that does not heal is the most common symptom of oral cancer. 2  Pain: Persistent mouth pain is another common oral cancer sign.  A lump or thickening in the cheek.
MOUTH DISEASES SIGNS AND SYMPTOMS. Foul odor, tooth decay, bleeding gums, pain, swelling in the gums or jaw, broken teeth, dry mouth, sores in the mouth or on the tongue or lips, âfuzzyâ tongue, fatigue, weight loss, random fevers, and an unpleasant taste in the mouth are all signs of some form of mouth disease.