By Dr. Andrew Kelson, DDS · Dental Horizons, Longmont, CO
A few years ago, during the long stretch when full-time masks were part of everyone’s workday, I noticed something about myself. The longer my mask stayed on, the more I breathed through my mouth. I had been practicing dentistry for well over a decade, and I had never given much thought to how I breathed. That small moment changed the way I look at every person who sits in my chair.
I used to look in a mouth and see teeth. Now I see the tongue, the shape of the palate, the bite and the wear on the back teeth, and I ask WHY they look the way they do. More often than I expected, part of the answer is breathing, especially at night.
Here’s the simplest way I can put it: your mouth is for eating, and your nose is for breathing. When those roles get swapped, your teeth, your gums and your sleep all feel it.
Why does it matter whether you breathe through your nose or your mouth?
Your nose is built for breathing; your mouth is the backup. Your nose filters, warms and humidifies the air before it reaches your lungs. Your sinuses also release nitric oxide, a gas that helps your airways and blood vessels work well. Breathing through your mouth skips all of that.
Your mouth pays a price too. Open-mouth breathing dries out your gums and the soft tissue around your teeth. Saliva is your mouth’s natural defense: it rinses away food, neutralizes acid and keeps bacteria in balance. When it dries up for hours every night, the balance tips toward the bacteria that cause gum inflammation and decay.
What can chronic mouth breathing do over time?
The effects build slowly, so most people never connect them to breathing. In my practice, these are the patterns that make me ask more questions:
- Gum inflammation or new cavities that seem out of proportion to how well someone brushes and flosses.
- A dry mouth and bad breath on waking.
- Worn, chipped or cracked teeth from nighttime grinding, often with jaw or facial soreness.
- Changes in the bite. In children especially, long-term mouth breathing can influence how the jaws and face develop.
- Poor-quality sleep. Mouth breathing often travels with snoring and sleep-disordered breathing, which can leave you tired no matter how many hours you spend in bed.
What are the signs you breathe through your mouth at night?
You can’t watch yourself sleep, so the clues usually show up in the morning:
- A dry mouth or sore throat
- Chapped lips
- Waking up tired, foggy or with a headache
- A partner who tells you that you snore
- Getting up multiple times in the night to go to the bathroom
Mouth breathing is NOT the only reason you may have these signs or symptoms, but if several of these sound familiar, it’s worth a conversation.
For women, this deserves extra attention after 40. Sleep-disordered breathing becomes more common around and after menopause, and in women it often shows up as fatigue, restless sleep or morning headaches rather than loud snoring. It’s easy to blame a busy life when the real cause is how you’re breathing at night.
Why can’t I just decide to breathe through my nose?
During the day, you can practice. At night, your body does what your anatomy allows. Mouth breathing usually has a cause: a congested or narrow nasal passage, a deviated septum, a narrow palate, a tongue that rests low in the mouth, or a tight tongue attachment (tongue-tie) that makes it harder to keep your lips closed and your tongue where it belongs.
That’s why there is no one-size-fits-all fix. The right next step depends on what’s behind it, and that’s what we look for.
What about mouth taping?
You’ve probably seen it on social media. A small strip of tape over the lips can nudge some people toward nasal breathing at night, and some of my patients like it. But it isn’t for everyone, and it should never be used to cover up a bigger problem. If you can’t comfortably breathe through your nose with your mouth closed, or if there’s any chance you have sleep apnea, taping is not the answer. Please talk with us or your physician before you try it.
What does an airway evaluation at Dental Horizons look like?
As part of a comprehensive exam, we look at more than your teeth. We check your tongue posture, palate shape, bite, tooth wear and gum health, and we ask how you sleep and how you feel during the day. When the signs point to a breathing or sleep problem, we can help arrange a sleep test and coordinate treatment with your physician. When a diagnosis is confirmed, we’ll talk through treatment options, which may include a custom oral appliance, tongue exercises, or minor surgery using laser therapy.
One patient told us that after treatment, he had started dreaming again for the first time in years, and that his wife noticed he was a happier person to be around. That is why this work matters so much to me. Better breathing means better sleep, and better sleep touches everything else: your energy, your mood and your long-term health.
The bottom line
How you breathe is one of the clearest examples of how your mouth connects to the rest of your body. If you suspect you’re a mouth breather, or you’ve noticed it in someone you love, let’s talk. You can also learn more about our airway and sleep care and how your mouth connects to the rest of your body.
Yours in good dental health,
Dr. Kelson
Frequently asked questions
Is mouth breathing bad for your teeth?
Yes. It dries out the mouth and weakens the protective effect of saliva, which raises the risk of gum inflammation, tooth decay and bad breath.
Can a dentist tell if you have a sleep problem?
Often, yes. Tooth wear, a scalloped tongue, a narrow palate and certain bite patterns can all be clues. A dentist can flag them, but a sleep test is needed to confirm a diagnosis.
Is mouth taping safe?
It may help some people who already breathe comfortably through their nose. It isn’t appropriate if your nose is blocked or if you might have sleep apnea. Ask your dentist or physician first.
Do you help with sleep apnea in Longmont?
Yes. Dental Horizons evaluates airway and sleep concerns, works with sleep physicians on testing and diagnosis, and provides custom oral appliances, tongue exercises, or minor surgery using “Lightscalpel” laser therapy when it’s the right fit.
Information in this article is educational and is not dental or medical advice. For guidance on your specific situation, please consult our office or your physician.