Idk man go to a dentist lol

Cancer of the mouth

alien sperms

Dark Matter (aka Nibbler poop).

Go to the dentist.

Eaten any kind of berries? I usually check my teeth after eating blackberries/blueberries/raspberries as little bits of fruit skin tend to get stuck there... blueberry skin doesn't seem to brush off easily either.

Have you been taking Tums or any other kind of heartburn medicine? I ask because said medicines can sometimes cause your body to stop producing one of the 2 chemicals that make up saliva which in turn makes your saliva black. I often wake up with a black tongue and black teeth in the morning if i take tums at night. Its totally harmless and washes off easily. Thats my only guess as to what it might be.

@TWRoO
No I haven't eaten any berries.

@Funtime
No, I haven't had Tums or any other medicine

@Pezus
I mean Black, not dark. How the hell would dark matter get in my teeth? Unless... no, it's immpossible. And if it was dark matter, I'm pretty sure I couldn't just retrieve it with my hand and simply discard it in my trashbin.

And I'm not going to my dentist.

My dentist... he's evil. I'm serious. And I don't trust evil people in my mouth. There's not telling what he'll do in there.