I brush and floss twice a day. Lately, I notice that occasionally when I floss between 2 particular teeth, the floss comes out brown. It's always between the same two molars and I have to floss the area a few times before the brown stuff stops coming out. I'm not experiencing any pain or sensitivity that I've noticed. Could it be a cavity? Or just regular floss "gunk"?
It is possible that the tarter that accumulates under the gumline has turned black, which it will do if it is there for a long time. That is the start of periodontal disease. You really can't reach it completely with normal brushing and flossing. Only your hygienist can.
You probably just need a thorough cleaning. Do get it though. Leaving that plaque there can start to dissolve the bone holding the tooth in.
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