My boyfriend has a small wiggly piece of gum hanging down out of his actual gum, it's a little red but it's not on his tooth, what could this be?

I've been having a look online but it's not really near his tooth, its like above on the outside above his teeth if that makes sense.
My boyfriend has a small wiggly piece of gum hanging down out of his actual gum, it's a little red but it's not on his tooth, what could this be?
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