I never knew this was a "thing" until my friend told me this, and sure enough, every single time I go "geee, Ava has had a couple extra loose poops today" I check her mouth, and voila! new tooth. It's usually her only sign she's even teething/gotten a tooth, other than some crabbies and using her cast as a weapon on my face.
Does your kid get the schizzles with new teeth?
Re: Does diarrhea = new tooth with your kid?