Lots of things: Could be a small boney protuberance called a torus, a blocked swollen minor salivary gland, a draining abscessed tooth, a gum infection, or one of innumerable types of lesions. Has to be examined to be diagnosed. Please call your dentist for an appointment.
Answered 7/6/2015
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Hard or soft ?: It might be a bony exostosis. Your dentist can tell you for sure since it needs to be visualized.
Answered 2/27/2014
4.4k views
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