Source: https://health.usnews.com/wellness/articles/toothache-and-sinus-pain-understanding-the-connection
We’re exploring the surprising link between sinus infections and dental problems. A condition called maxillary sinusitis of dental origin (MSDO), sometimes called “sinus tooth,” happens when bacteria from a tooth infection or gum disease spreads into the sinus cavity behind your cheekbones.
In fact, research shows that more than 40% of maxillary sinus infections start in the mouth, but because the symptoms mimic typical sinus problems, many cases go undiagnosed. Common warning signs include:
- Pressure or pain in the cheeks or under the eyes (often just on one side)
- One-sided nasal congestion or runny nose
- Bad taste or foul odor in the mouth
- Post-nasal drip or low-grade fever
Since the pain can feel like a sinus infection, patients often see their doctor or ENT first, when the root cause may actually be dental. Left untreated, MSDO can spread and cause serious complications.
The bottom line: consistent brushing, flossing, and dental visits help prevent infections that can spread beyond your mouth. And if you suffer frequent sinus infections—especially one-sided ones—let us know. Sometimes, the key to sinus relief starts with your smile.