Some people develop regular infections in their sinuses. This is known as “sinusitis of dental origin.” the bacteria may spread from the roots of your upper teeth into your sinuses, causing a sinus infection. Tooth Infection And Sinusitis - Medical Orofacial Surgery When you get sinus pressure or a sinus infection the inflammation of the sinus membrane and pressure from fluid in the sinus can put pressure on the nerves that give feeling to the upper teeth. Can you get a sinus infection after dental work . 13 years ago i did a root canal. Let me share my experience. You should be vigilant in the days after your dental work and try to spot any. Precautions for eating and drinking. 2 years after that the tooth began to hurt again causing pain up my nose and face area. If you have reason to suspect a tooth infection or are just tired of ineffective treatments for your “sinus infection,” it’s time to talk to a dentist. Make sure your gums and teeth are in their best st...