2025 systematic review · safety-first

Mouth Taping for Sleep: What the 2025 Evidence Review Found

Mouth taping has become popular as a snoring and “nasal breathing” hack, but the strongest synthesis available—a 2025 systematic review—found a small, heterogeneous, low-quality evidence base and identified potentially serious risks in some people. This page puts that review first and keeps snoring and sleep-apnea evaluation as the safer next step.

10 studies213 total participantsPoor-quality evidencePotential harm with obstruction

Risks first

Do not treat mouth taping as a harmless snoring fix

The 2025 systematic review found that four of the ten included studies explicitly discussed a serious asphyxiation concern when oral occlusion was used in the presence of nasal obstruction or regurgitation. Several studies excluded people with nasal obstruction, which means reassuring findings from those selected participants may not apply to people who mouth-breathe because their nose is blocked.

Be especially cautious if you have nasal obstruction, chronic congestion, or structural nasal problems.
If you snore frequently, wake gasping/choking, have witnessed breathing pauses, or significant daytime sleepiness, seek evaluation for sleep apnea rather than taping over the symptom.
If you have known sleep apnea, do not substitute mouth taping for prescribed therapy.
If regurgitation or reflux reaches the mouth during sleep, the review identified oral occlusion as a potential safety concern.

Primary evidence

The 2025 PLOS One Systematic Review

Rhee and colleagues published a systematic review in PLOS One on May 21, 2025. The authors searched MEDLINE, Embase, and Google Scholar, screened 120 records, and included 10 studies with a combined 213 participants. The studies covered mouth taping and related forms of oral occlusion in people with mouth breathing, sleep-disordered breathing, or obstructive sleep apnea.

Studies met inclusion criteria.

Rhee et al., 2025

213

Total participants across the included studies.

Small evidence base

Studies showed statistically significant improvement in established sleep-apnea markers.

Does not establish routine clinical benefit

What the review concluded: the evidence did not strongly support mouth taping or other oral-occlusion devices as a general intervention for sleep-disordered breathing. The authors said there may be a narrow potential use case in selected people with mild OSA, but emphasized poor study quality, heterogeneity, limited evidence, and potential harm—especially when nasal obstruction is present.

Important correction: “Two studies showed statistically significant benefit” does not mean mouth taping is proven effective. All included studies were rated poor quality on the Newcastle–Ottawa assessment, the studies were heterogeneous, and the authors could not perform a pooled statistical analysis.

What the Review Supports—and What It Does Not

Claim	What the 2025 review supports	Safer wording
“Mouth taping stops snoring”	Evidence was inconsistent across a small, heterogeneous literature.	Some selected participants in small studies had improvement, but routine benefit for snoring is not established.
“Mouth taping treats sleep apnea”	Two included studies reported significant changes in AHI or oxygen-desaturation measures; benefit was limited to selected mild-OSA populations.	There is insufficient evidence to use mouth taping as an OSA treatment.
“Mouth taping is safe if you can breathe through your nose”	Several studies excluded nasal pathology; four studies discussed serious asphyxiation risk with obstruction or regurgitation.	The review does not establish general safety, especially outside carefully selected participants.
“It improves oxygen levels”	The review did not establish a general oxygenation benefit in healthy sleepers.	Nasal breathing physiology should not be confused with evidence that taping improves oxygenation.
“It is safe for everyone with mild snoring”	Not established.	Snoring can be a symptom of OSA; evaluate the cause before trying an airway-occluding technique.

Why the Evidence Is Still Uncertain

Small total sample

Only 213 participants were represented across all 10 studies.

Poor study quality

The review rated all included studies as poor quality for different reasons using the Newcastle–Ottawa framework.

Heterogeneous methods

The studies used different devices, populations, outcomes, and designs, preventing meaningful pooled statistical analysis.

Selected participants

Several studies excluded people with nasal obstruction—the very group that may be more likely to mouth-breathe in real life.

Mild OSA dominated positive signals

The limited positive findings should not be generalized to moderate or severe OSA.

Safety evidence is incomplete

The review identified potential risks but was not designed to calculate a precise complication rate.

Because the review did not estimate a reliable incidence of harm, this page does not claim that a specific percentage of users will experience oxygen drops, respiratory distress, aspiration, or another complication.

Safer next step

If Your Goal Is to Stop Snoring, Start With the Cause

Snoring is common, but persistent loud snoring can also be a clue to obstructive sleep apnea. Rather than physically closing the mouth before knowing why you are mouth-breathing or snoring, start with symptom assessment.

Review your snoring pattern

Note how often you snore, whether it is loud, whether anyone sees breathing pauses, and whether you wake choking or gasping. See the SmartSleepCalc snoring guide.

Check for sleep-apnea warning signs

Habitual loud snoring, witnessed apnea, gasping/choking, hypertension, and excessive daytime sleepiness are reasons to discuss OSA evaluation with a healthcare professional.

Address nasal obstruction directly

If your nose is frequently blocked, ask a clinician whether allergy, rhinitis, septal deviation, or another nasal problem needs treatment rather than bypassing it with mouth tape.

Screening Is Not the Same as Diagnosing Sleep Apnea

A screening tool can estimate whether your symptoms raise concern, but it cannot diagnose OSA. The American Academy of Sleep Medicine recommends that OSA diagnosis be made with appropriate sleep testing—polysomnography or, in selected uncomplicated adults, a medically ordered home sleep apnea test.

Screening

Tools such as STOP-BANG can flag increased risk. Use them as a prompt for evaluation, not as proof of OSA. Try the STOP-BANG screening calculator.

Diagnosis

Requires clinical assessment plus appropriate sleep testing. AASM states that only a medical provider can diagnose OSA or primary snoring.

Consider medical evaluation before experimenting with mouth taping if you have frequent loud snoring, witnessed breathing pauses, gasping/choking during sleep, significant daytime sleepiness, or known/suspected sleep apnea.

Secondary Expert Commentary: Useful Context, Not the Main Evidence

Several health systems—including Cleveland Clinic, OSF HealthCare, Banner Health, and Houston Methodist—have published clinician commentary warning about mouth taping in people with nasal obstruction or suspected sleep-disordered breathing. Those articles are useful practical context, but they are secondary sources. This page therefore relies on the 2025 systematic review for its central evidence claims rather than building the argument around selected quotations.

What Was Changed From the Previous Page

The previous page’s hero led with a Cleveland Clinic quotation and stated that mouth taping could cause “severe respiratory distress” and “significant drops in oxygen levels” as a central universal-sounding safety message. fileciteturn50file0L425-L453 The revised page leads with the systematic review’s more defensible conclusion: there is a potentially serious risk of harm with indiscriminate use, particularly when nasal obstruction is present.

The earlier FAQ also stated that mouth taping “is not considered safe without prior sleep evaluation” and presented several secondary-source recommendations as near-universal rules. fileciteturn51file0L10-L45 Those absolutes have been replaced with what the systematic review actually supports and with AASM-based guidance for evaluating snoring and suspected OSA.

The review itself included only 10 studies and 213 participants, found two studies with significant improvement in apnea-related markers, and identified explicit asphyxiation concerns in four studies when nasal obstruction or regurgitation was present. fileciteturn51file7L425-L453 These figures remain, but are presented alongside the review’s poor-quality and heterogeneity limitations.

Frequently Asked Questions

Is mouth taping proven to improve sleep?

No. The 2025 systematic review found limited and heterogeneous evidence, with all included studies rated poor quality. More high-quality research is needed.

Does mouth taping stop snoring?

Not reliably based on current evidence. Some small studies reported improvement in selected participants, but the review does not support routine use for general snoring.

Can mouth taping be dangerous?

The 2025 review identified potentially serious risk, especially when oral occlusion is used in someone with nasal obstruction or when regurgitation occurs. It did not establish a precise complication rate.

What if I snore every night?

Persistent loud snoring deserves evaluation, especially if it occurs with witnessed breathing pauses, gasping, choking, hypertension, or daytime sleepiness. These can be warning signs of obstructive sleep apnea.

Can STOP-BANG diagnose sleep apnea?

No. STOP-BANG is a screening questionnaire. Diagnosis requires appropriate sleep testing and clinical interpretation.

Primary and Supporting Sources

Primary evidence: 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. Full review
Diagnostic guidance: American Academy of Sleep Medicine. Diagnostic testing guideline for adult OSA. AASM guideline
HSAT position: American Academy of Sleep Medicine. Clinical use of a home sleep apnea test. AASM statement

Educational use only: This page summarizes published evidence and does not diagnose or treat snoring, sleep apnea, nasal obstruction, or any other condition. If you have repeated choking/gasping, witnessed breathing pauses, severe daytime sleepiness, or other concerning symptoms, seek medical evaluation.