can a dentist tell by looking at your teeth if you have sinus problems?

Question

just wondering i had a tooth filled and while he was doing it the dentist asked me if i had sinus problems

Answer 1

JUST BY LOOKING?
NO, BUT THERE ARE SIMPLE TEST IS TO PINCH YOUR NOSE AND PLACE YOU LOWER YOUR HEAD BELOW YOUR KNEES WHILE SITTING DOWN.
IF YOU GET PAIN IN THE UPPER TEETH FOR A FEW SECONDS, THEN THIS PAIN IS FROM A SINUS INFECTION.