Taping your mouth at night makes you breathe better
Short answerNo
- Carbon dioxide
- Rises
- How well tested
- Weak
- Risk
- Some
On this page
No. A 2025 review pulled together every study of mouth taping and similar devices it could find, 10 in all. Every one was rated poor quality, most found little or no benefit, and four warned of a risk of suffocation in people whose nose is blocked. We’d leave the tape in the drawer.
What we’d do
Don’t tape your mouth shut at night. If you breathe through your mouth when you sleep, find out why. A blocked nose, allergies or snoring are things a doctor can look at. If you snore loudly, wake up gasping, or someone has seen you stop breathing in your sleep, ask for a sleep study. During the day, breathing through your nose in your breathing practice is a fine habit, and it needs no tape.
If you remember three things
- The evidence is thin and weak. Ten studies, 9 to 71 people each, all rated poor quality.
- The risk is real for some people. If your nose blocks up at night, your mouth is your backup airway.
- Mouth breathing at night has a cause. Find it instead of taping over it.
Why it seems true
Mouth taping took off on social media. People say it gives them better sleep, less snoring, fresher breath, less dry mouth, sharper focus, even younger-looking skin. It also fits a real idea, that breathing through your nose is the normal way to breathe, and many breathing practices, including the cyclic sighing in the Stanford trial, start with a breath in through the nose. If nose breathing is good, holding your mouth shut so you can’t do anything else sounds like a shortcut.
The catch is that people don’t breathe through their mouths at night for no reason. Often it’s because the nose or throat is partly blocked. Taping your mouth then is like locking the back door because the front door sticks. It works fine until you need to get out.
What the review found
In 2025, a team of ear, nose and throat doctors and librarians in London, Ontario, published a systematic review of mouth taping. They searched the medical literature from 1999 to 2024 for any study of taping, mouth seals, oral patches or chin straps in people who mouth breathe, snore or have sleep apnea. They found 10 studies, with 9 to 71 people each and 233 people in total.
- Quality. Every study was rated poor quality on a standard checklist for this kind of research.
- Benefit. Six studies measured the number of breathing pauses an hour during sleep. Two found a drop. In one, a 2022 study of 20 people with mild sleep apnea, the median fell from 8.3 to 4.7 an hour. In the other, from 12 to 7.8. Both studies only took people with mild apnea, and the review’s authors say it’s unclear whether drops that size mean anything for health. Three studies found no change.
- Risk. Four of the 10 studies said outright that sealing the mouth could pose a serious risk of asphyxiation if the nose is blocked or if someone regurgitates in their sleep. One of the studies that did find a benefit said taping isn’t recommended for moderate or severe sleep apnea.
- Who was left out. Four studies excluded anyone with any kind of nasal blockage. So the people most likely to mouth breathe at night were mostly not tested.
The authors’ conclusion was that the existing data don’t support mouth taping as a treatment for people with sleep-disordered breathing, and that more studies would be needed to show any benefit.
Why mouth breathing at night needs a closer look
The review describes nasal blockage as both a cause and a result of sleep-disordered breathing, and sleep apnea as its extreme end, with drops in oxygen through the night and, over time, links to high blood pressure and heart and lung problems. Mouth breathing can be a sign of that. Taping over it hides the sign without treating whatever is causing it, and if the cause is a blocked nose, the tape takes away the way around it.
If your ring or watch shows your blood oxygen at night, oxygen.guide explains what’s normal while you sleep and when a low night means a sleep study.
A dry mouth in the morning, loud snoring or someone telling you that you stop breathing at night are reasons to see a doctor. Tape won’t fix any of them. A sleep study is how apnea gets diagnosed, and it has established treatments, such as CPAP machines.
What about nose breathing during the day?
That’s a different thing, and it’s fine. Most slow breathing patterns, including the ones on our timer, start with a breath in through the nose. In the Stanford trial, the cyclic sighing group breathed in through the nose and out through the mouth, and could breathe all through the nose if they preferred. You choose to do it while you’re awake, and you can open your mouth any time you need to. Is breathing through your nose better?
More detail: what the studies tested
The 10 studies didn’t all test the same thing. Some used tape or an adhesive patch over the lips, some a mouth seal, some a chin strap, and several were in people already using a CPAP machine for sleep apnea, where an open mouth lets air leak out. One of the oldest, from 1999, warned against taping the mouth for long-term home use because of the risk of asphyxia if the nose is blocked, the machine fails or the person regurgitates. The studies that found drops in breathing pauses were small, and in people with mild apnea. None of them tested the broad benefits claimed online, like better focus or anti-aging.
2 sources
- Rhee and others, Breaking social media fads and uncovering the safety and efficacy of mouth taping in patients with mouth breathing, sleep disordered breathing, or obstructive sleep apnea: a systematic review, PLOS One, 2025journals.plos.org
- Balban and others, Brief structured respiration practices enhance mood and reduce physiological arousal, Cell Reports Medicine, 2023pmc.ncbi.nlm.nih.gov
