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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.
What are the symptoms of tongue cancer? Oral Tongue Cancer. A lump on the side of the tongue that touches the teeth. The lump often looks like an ulcer and is grayish-pink to red. The lump bleeds easily if bitten or touched. Base of Tongue Cancer. The tumor is often difficult to see in the early stages, so it is usually diagnosed when it is larger. There are few symptoms in the early stages. In later stages, the cancer may cause pain, a sense of fullness in the throat, difficulty swallowing, the feeling of a lump in the neck or throat, voice changes or ear pain.