teeth ache/feel irritable

[mu0n]

Quite often, not sure if stress related, but it feel like nearly all my teeth are aching almost like a pressure... Like they're pressing on each other.

Any ideas on what it could be? It's annoying and makes me irritable as well. Seems to be more towards the back and top but I feel it over most of my mouth.

[mu0n]

I thought it was a sinus issue and still think it is. Doc gave me a nasal spray as often get pressure feeling in ears and stuffy nose. Not sure this spray is the answer.

What are other signs of teeth grinding?