Does Mouth Taping Work? What the Sleep Studies Actually Show

Mouth taping sells itself on a simple idea. Breathe through your nose at night and you will snore less, sleep better and wake up without a dry mouth. On Instagram it looks settled. A 2026 study of 390 mouth taping reels found that 94 percent of them endorsed it, more than half were posted by companies, and about 12 percent were posted by medical professionals.¹

The research looks nothing like that. I tape my mouth at night myself. That does not change what the studies found, so here it is, including the parts that are not flattering.

The short answer

For most people, nobody knows, because it has barely been studied. The studies that exist are small, mostly have no comparison group, and were done in people with mild sleep apnea who were screened carefully first. In that narrow group there is a modest signal. Outside it, there is not much evidence of benefit, and there is some evidence of harm.

What the reviews found

A 2025 systematic review in PLOS One, from an ear, nose and throat team in Ontario, pulled together every study it could find from 1999 to 2024. It found 10, with about 200 patients in total. It rated every mouth taping study as poor quality. Four of the ten raised “a serious risk of asphyxiation in the presence of nasal obstruction.” Its conclusion was blunt: the data “does not support mouth taping or oral occlusion as a sound clinical intervention for the general population with sleep disordered breathing.”²

A 2025 scoping review in the American Journal of Otolaryngology screened 177 studies, kept 9, and found “little consensus on mouth-taping’s benefits.”³

The newest review, published in August 2026, could not pool the mouth taping studies at all. There were only two, with 50 people between them, all with mild apnea. The authors said taping “may benefit selected patients in the short term,” mostly people with mild apnea and a clear nose, but that the lack of evidence “discouraged the use of this intervention in current clinical practice.”⁴

The studies that found something

These are the results people usually mean when they say mouth taping works.

• Twenty mouth breathers with mild apnea, one week of tape. A 2022 study had them sleep with 3M silicone tape for a week. The median number of breathing interruptions per hour fell from 8.3 to 4.7, and snoring fell by more than half. Thirteen of the twenty counted as responders. There was no control group, and the authors said mouth taping “is not recommended for moderate or severe OSA patients.”⁵
• Thirty people with mild apnea and a porous mouth patch. A 2015 pilot found the median fell from 12.0 to 7.8 events an hour, and daytime sleepiness scores improved. Again, no control group.⁶
• Tape on top of a mouth guard. In a 2022 crossover study of 21 people, adding a mouth seal to a mandibular advancement device helped. The mouth seal on its own “did not significantly reduce” apnea.⁷
• Tape with CPAP. A 2025 randomised crossover trial in 62 people with moderate to severe apnea who leaked air through their mouths found that adding tape raised CPAP use by about 52 minutes a night. That is tape as a helper for a machine a doctor prescribed, not tape instead of treatment.⁸

The studies that found problems

• Oxygen drops that got worse. In a small 2023 study of taped patients with apnea, people puffed air out through the tape during sleep. The review above tables their oxygen desaturation index as rising from 16.3 to 30.5 an hour with tape on, which is worse, not better.²
• Less airflow in heavy mouth breathers. A 2024 study in JAMA Otolaryngology closed the mouths of 54 people with apnea during a sleep endoscopy. Overall, airflow improved. But in the people who breathed through their mouths the most, closing the mouth made airflow worse, by about 1.9 litres a minute. One of the authors reported fees from SomniFix, a mouth strip company, outside this study.⁹

That second finding matters. The people most drawn to mouth tape, heavy mouth breathers, are the group in which closing the mouth reduced airflow.

Who should not try it

• Anyone with a blocked nose, from a cold, allergies, polyps or a deviated septum.
• Anyone who might have sleep apnea and has not been tested. Loud snoring, gasping awake and daytime exhaustion are the classic signs. The American Academy of Otolaryngic Allergy says “Taping the mouth is not a treatment for sleep apnea” and advises talking to an ENT first.¹⁰
• Anyone at risk of vomiting or reflux in their sleep, which is one of the choking risks the review flagged.

The American Academy of Sleep Medicine has not issued a formal guideline, but in 2023 its spokesperson called mouth taping “extremely dangerous” at worst and “unproven” at best.¹¹

If you still want to try it

If your nose is clear and you have been checked for sleep apnea, the cautious version looks like this. Use a gentle silicone tape or a strip made for the job rather than strong plastic tape. Skip it on congested nights. Stop if you wake more often or feel worse. And treat it as an experiment, not a treatment. There is more on the different tapes in my guide to mouth tape.

Quick questions

Does mouth taping stop snoring?
In one small study of people with mild apnea, snoring fell by more than half in a week. There was no comparison group, and snoring can be a sign of apnea, which tape does not treat.

Is mouth taping safe?
Nobody has studied it well enough to say for everyone. The studies only included people who were screened first, and reviewers flagged a risk of suffocation in people with a blocked nose.

Does it help sleep apnea?
Only a little, only in mild cases, and only in small studies. It is not a substitute for a sleep test or for treatment.

Why do so many people swear by it?
Some of them may be right for themselves. But most mouth taping content online is posted by companies, and the studies are too small to say who benefits.

The bottom line

Mouth taping has a small, weak signal in people with mild apnea and a clear nose, and some evidence of harm in people it does not suit. Every review so far says the same thing in different words: not enough evidence to recommend it. If you try it, get your nose and your sleep checked first.

References

1. Bizzoca ME, et al. The spread of non-evidence-based health claims on social media: the case of #Mouthtape on Instagram. Dent J. 2026;14(7):418. PubMed
2. Rhee J, Iansavitchene A, Mannala S, Graham ME, Rotenberg B. 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. 2025;20(5):e0323643. PubMed
3. Fangmeyer SK, Badger CD, Thakkar PG. Nocturnal mouth-taping and social media: a scoping review of the evidence. Am J Otolaryngol. 2025;46(1):104545. PubMed
4. Alshehri NA, Alsaif NF, Abdulrazaq AN, Jabor RM, Al-Sayed AA. Impact of nasal obstruction and mouth taping on sleep apnea indicators: systematic review and meta-analysis. OTO Open. 2026;10(3):e70294. PubMed
5. Lee YC, Lu CT, Cheng WN, Li HY. The impact of mouth-taping in mouth-breathers with mild obstructive sleep apnea: a preliminary study. Healthcare (Basel). 2022;10(9):1755. PubMed
6. Huang TW, Young TH. Novel porous oral patches for patients with mild obstructive sleep apnea and mouth breathing: a pilot study. Otolaryngol Head Neck Surg. 2015;152(2):369-73. PubMed
7. Labarca G, et al. Mouth closing to improve the efficacy of mandibular advancement devices in sleep apnea. Ann Am Thorac Soc. 2022;19(7):1185-1192. PubMed
8. Meksukree A, et al. The role of mouth tape for CPAP use in patients with mouth breathing and OSA. J Clin Sleep Med. 2025;21(12):2063-2071. PubMed
9. Yang H, Huyett P, et al. Mouth closure and airflow in patients with obstructive sleep apnea: a nonrandomized clinical trial. JAMA Otolaryngol Head Neck Surg. 2024;150(11):1012-1019. PubMed
10. American Academy of Otolaryngic Allergy. Keep your mouth shut at night? 2025 Feb 4. AAOA
11. American Academy of Sleep Medicine. Viral TikTok trends are not the answer for better sleep. 2023 Jul 25. AASM