Can A Dentist Please Answer This Question, My Tooth Throbs a Little When...?

My tooth that my DDS and I have been trying to figure out what's wrong with it... it's ok until I get my blood pumping. It doesn't seem to show signs of needing a RC, and my DDS has a post grad degree in endodontics so she performs all the tests, and all my root canals. And all of them have been fine. We are also considering grinding and clinching... but could grinding and clinching cause the tooth to throb at times when my blood is pumping (me moving around alot) or when I drink cool liquids? Is that possible? Thanks for your help.

Can A Dentist Please Answer This Question, My Tooth Throbs a Little When...?
There are a couple of issues that could make your tooth throb, and gritting and grinding could certainly be one of them, Simple clinching, which some people do, could also explain the throbbing...If you are gritting, grinding or clinching, you have a stress issue and that can't be solved by any method other than professional counseling to find out what is causing the Stress...Stress comes from one of six areas, Money, Marriage, Health, Employment, Self Esteem and Sex...Makes no difference if your a child or an adult, if there is something going on in any of those areas, even if it's someone else who is actually involved, and your emotionally attached to them, you can Stress out......On the other hand, your description could indicate you have a Sinus issue. A sinus infection can cause pressures and that in turn places pressure on the nerve trunk, and that in turn can pressure a tooth nerve causing discomfort.....Now, back to the HBP (High Blood Pressure)...that can be a symptom of Stress, so reread what I said about Stress above and give it some serious consideration. Good luck and I wish you well.