It’s that time of year when allergies and sinus problems keep people indoors and loading up on nasal sprays and decongestants. If you are one of the unlucky individuals who are dealing with a nagging toothache, you might assume it’s caused by the increased pressure in your sinus cavity, but is it? What if it’s an abscess or other serious infection that requires root canal therapy or tooth extraction? Before you brush it off as a common side effect of your sinuses acting up, take some time to learn what signs to look for that might have you calling your dentist for help.