Wisdom tooth hole?!?

I got my left lower wisdom tooth removed on Thursday last week and got stitches(which have been removed) I noticed there’s a deep looking dark hole right behind my molar and I was wondering if that’s normal... it doesn’t hurt or anything.. I’m just concerned if it will close up bc I don’t want anything to get... show more I got my left lower wisdom tooth removed on Thursday last week and got stitches(which have been removed) I noticed there’s a deep looking dark hole right behind my molar and I was wondering if that’s normal... it doesn’t hurt or anything.. I’m just concerned if it will close up bc I don’t want anything to get trapped in it.
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