question: I have a pain sensitivity in my upper left molar area. Dentist examined and found nothing.  It feels like a gum inflamation and is sensitive to cold liquid..I am suspicious that it may be sinus related, as it hurts when I blow my nose to clear nasal congestion. It isn't constant, but feel it most of the time.  Also hurts when I brush the gumline (pocket) on back side of the last molar.  It has been approx 2-3 weeks since I saw dentist. Thanks.