Is sensitive teeth a symptom for a hairline fracture in my teeth?

It is a symptom, but there are many reasons for sensitive teeth as well. If you do feel it, especially if it’s just on one tooth and it has suddenly appeared out of nowhere like acute, one of the more likely reasons is a cracked tooth. Like I said, time is of the essence when it comes to dentistry and dental work, and saving your tooth. Don’t delay on all these things. I think another common symptom that people have is when they have sensitive teeth and then it goes away, and then it comes back a month later or a little bit later. And then it goes away. Once it really cracks through, and they come and visit us, and that’s a bit too late we can’t save it. So really, as soon as there’s a symptom that could potentially be it, it’s better that we treat it early and nip it in the bud.