anything that has well defined edges typically isn't cancer... cancer tumors spread out more flat (there are exceptions) and they infiltrate other tissues ... so to the touch a cancer would feel more like a fried egg shape and a cyst or noncancer would feel more like boiled egg...
also, mouth cancers tend to be "seepy" and almost all surface cancers tend to be discovered as semi-open wounds that don't heal...
it is probably an inflamed gland or cyst
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