Hello, i would be grateful for any advice please. For years i have suffered on and off with sinus infections. The last two weeks upon waking i have experienced a pressure like sensation in my upper back teeth on my right side. This subsides completely after being up and about for about ten minutes. Is this typical of a sinus infections? Other than some post nasal drip and the occasional headache i have no other symptoms. My teeth are otherwise fine, no pain or sensitivity.