It’s Not Just What You Ate
Most people think, “Oh my god, I just ate at Olive Garden and that’s it.” BUT let’s move beyond the diet. A lot of times people don’t realize how important it is to brush your tongue.
The Tongue Connection
Your tongue is made of these little hairs called papillae that are kind of reaching out and grabbing bacteria and food and matting it down to the tongue. And if you free your tongue of those components, it doesn’t harbor those yucky components that kind of get stale in your mouth.
So, always brush your tongue. There are multiple ways to care for your tongue. You can use your own brush or a tongue scraper. The other day, I showed a patient how to tongue scrape and the amount of buildup we removed amazed her. She said, “Wow.”
The science backs this up: research shows that tongue cleaning can significantly reduce volatile sulfur compounds, the primary cause of bad breath, with studies demonstrating up to 75% reduction in malodor after proper tongue scraping.
A Real-Life Example
I had a cancer patient who came in the other day and I really scraped his tongue because he was getting dry mouth and a lot of food matted on his tongue and he called me that night and told me, “I can finally taste my food again.” And I thought, “Well, great.” But it also freed a lot of bacteria and bad breath from his tongue. I’m sure his wife was happier, too, because that’s the main component of bad breath outside of foods causing your breath to not be lovely.
The Hidden Culprit: Allergies
So, brushing your tongue. But there’s a third component that a lot of my patients don’t realize is that they have allergies. Like right now in the fall, we have ragweed. We have all kinds of allergies and we get stuffy and we have mucus running down the back of our throat.
Post-nasal drip is probably the third component to bad breath. You get mucus coming up, bacteria, and allergens from the back of your throat. So, caring for your body is very important. See an allergist or take some holistic measures to try to make your body a little less reactive to allergens. Stay away from the allergens you’re allergic to. Don’t pick up your cat if you’re allergic to them. You know, that kind of thing.
Medical research confirms that chronic rhinitis and post-nasal drip contribute significantly to halitosis, as the mucus accumulation in the throat creates an ideal environment for odor-producing bacteria.
The Breathing Test
Keep your breathing techniques open, too. I always say if you can breathe through your nose, then you probably won’t have bad breath.
When you’re breathing through your mouth because you’re congested, you’re not only drying out your mouth—which reduces saliva’s natural cleaning action—but you’re also likely dealing with that post-nasal drip situation that’s bringing bacteria and mucus into your oral environment.
Studies show that mouth breathing significantly reduces saliva flow, and since saliva contains natural antimicrobial properties that help control bacteria, decreased saliva production directly contributes to bad breath.
A Holistic Approach to Fresh Breath
So the solution to persistent bad breath isn’t just popping mints or using mouthwash. It’s addressing the root causes: cleaning your tongue daily to remove the bacterial film that accumulates there, and managing your allergies or sinus issues so you’re not constantly dealing with post-nasal drip.
These are clinical issues that need attention, not just cosmetic ones. When you take care of these underlying problems, fresh breath follows naturally. Your body is trying to tell you something when you have persistent bad breath—listen to it, and address the real causes rather than just masking the symptoms.

