Does Mouth Taping Work? What the Research Shows

Mouth taping has gone from a niche biohack to a bedtime staple. On TikTok, the #mouthtaping tag has passed 740 million views, and many of its top videos are recent. The pitch is simple: put a strip of tape over your lips at night, force yourself to breathe through your nose, and wake up with deeper sleep, more energy, less snoring, fresher breath and even a sharper jawline.

It’s easy to see the appeal. It’s cheap, it feels like taking control of your sleep, and nasal breathing is generally the way your body is designed to breathe at rest. But the research is much thinner than the confidence in those videos suggests, and for some people it carries real risk.

Here’s what the evidence actually shows, who should never try it, and what to do instead.

What the trend claims

The claims vary by creator, but they usually include some mix of:

• Deeper, more restful sleep and more energy in the morning
• Less snoring
• Fewer cavities and less bad breath, because your mouth doesn’t dry out
• A better jawline or “facial structure”
• Better athletic recovery or performance

The idea underneath is reasonable. Your nose filters, warms and humidifies air, and people who breathe through their mouths at night often wake with a dry mouth. Dentists do point out that saliva protects teeth, so a chronically dry mouth isn’t ideal. The jump from “nasal breathing is good” to “tape your mouth shut every night” is where the evidence runs out.

What the research actually found

The 2025 systematic review

The most thorough look at the evidence so far is a systematic review led by researchers at Western University in Canada and published in 2025 (Rhee et al., 2025, PLOS One). They searched for every study they could find on mouth taping in people who mouth-breathe, snore or have obstructive sleep apnea.

What they found:

• Only 10 studies, with just over 200 participants in total. That’s very little research for something millions of people are trying.
• All 10 were rated poor quality. The studies were small and different enough from each other that the authors couldn’t combine their results statistically.
• Only two studies found a meaningful improvement in sleep apnea severity, and both included only people with mild sleep apnea.
• Three studies reported less snoring.
• Four studies raised safety concerns, including a potential risk of breathing difficulty, or asphyxiation, when the nose is obstructed.

The authors’ conclusion was blunt: the evidence doesn’t support mouth taping as a treatment for sleep-disordered breathing in the general population, and people with nasal obstruction could face a serious risk of harm.

The small studies behind the “it works” claims

The most cited positive study is a 2022 pilot from Taiwan (Lee et al., 2022, Healthcare). It included 20 mouth-breathers with mild obstructive sleep apnea who could tolerate taping. With their mouths taped, 13 of the 20 had a good response on home sleep tests, with fewer breathing interruptions and less snoring, and those with worse symptoms at the start tended to improve more.

That’s an interesting result, but it has big limits. There were only 20 people, with no comparison group, over a short period. Everyone already had a diagnosis and had been screened for whether they could tolerate tape. It tells us almost nothing about whether healthy people sleep better with tape, or whether it’s safe for someone who hasn’t been assessed.

The review also highlighted a detail that’s easy to miss: in one study, people with moderate mouth breathing improved with their mouths closed, but people with heavy mouth breathing got worse. In other words, the people most motivated to try tape may be the ones least likely to benefit.

What we don’t have

There’s no good evidence that mouth taping improves energy, focus, athletic performance or your jawline in healthy adults. Those claims come from personal experience and marketing, not studies.

The real risks

It can hide sleep apnea

This is the biggest concern. Obstructive sleep apnea happens when your airway repeatedly narrows or closes during sleep. Common signs, according to the National Heart, Lung, and Blood Institute, include:

• Frequent loud snoring
• Pauses in breathing, or gasping for air during sleep
• Daytime sleepiness and fatigue
• Dry mouth and headaches
• Waking often at night to urinate

Notice how much of that list overlaps with the reasons people try mouth tape. If tape makes your snoring quieter, you or your partner may stop noticing a symptom that should be checked. Quieter snoring isn’t the same as an open airway. Untreated sleep apnea is linked to serious health problems, and it’s very treatable once diagnosed.

It’s risky if your nose is blocked

If you mouth-breathe because your nose is congested, from allergies, a cold, a deviated septum or nasal polyps, taping your mouth removes your backup airway. That’s the scenario the 2025 review flagged as potentially dangerous. Most of the studies also excluded people with nasal obstruction, so we have little safety data for exactly the people most likely to be mouth-breathing.

Other things to watch for

• Alcohol, sleeping pills and sedating medications can make you harder to rouse and blunt your response to breathing problems. Don’t combine them with mouth tape.
• Skin irritation around the lips from adhesive is common.
• Anxiety. Some people find having their mouth taped distressing, which isn’t a great recipe for sleep.
• Children shouldn’t have their mouths taped. A child who snores or mouth-breathes should see a pediatrician.

Who should see a doctor first

Talk to a doctor or sleep specialist before trying mouth tape, or instead of it, if any of these apply:

• You snore loudly most nights
• Someone has noticed you stop breathing, choke or gasp in your sleep
• You wake up tired even after seven or more hours in bed
• You have frequent morning headaches or a very dry mouth
• You struggle with sleepiness while driving or at work
• You can’t comfortably breathe through your nose, especially lying down
• You have high blood pressure, heart disease or a lung condition

A doctor may suggest a home or lab sleep study. If it shows sleep apnea, there are effective treatments, including CPAP, oral appliances fitted by a dentist and, for some people, positional changes or weight management. If you sleep through alarms or wake up groggy no matter what, that’s also worth mentioning. Our guide to why some people can’t wake up to their alarm covers other possible causes.

Safer ways to support nasal breathing

If your goal is to breathe more comfortably through your nose at night, try these first.

Treat congestion

If your nose is often stuffy, that’s the problem to solve. Allergies, chronic sinus issues and structural problems like a deviated septum are common and treatable. A pharmacist or doctor can help you choose options like saline rinses or allergy treatments, and an ear, nose and throat specialist can assess structural issues.

Try nasal strips or dilators

External nasal strips gently pull the sides of your nose open to make breathing easier, without blocking your mouth. A systematic review found that nasal dilators improved nasal breathing but didn’t improve sleep apnea itself (Camacho et al., 2016, Pulmonary Medicine). So they’re reasonable for comfort or mild snoring in someone who’s already been checked, but not a fix for apnea.

Adjust your sleep position and environment

Some people snore more on their backs. Sleeping on your side, keeping the bedroom air from getting too dry and avoiding alcohol close to bedtime may help with mild snoring. These are low-risk changes, not treatments for apnea.

Be wary of “stacking” sleep hacks

Some online routines pair mouth tape with high-dose melatonin or other supplements. Supplements can interact with medications and aren’t something to self-prescribe in large doses. Ask a doctor or pharmacist before adding them.

If you still want to try it

If you’ve been checked by a doctor, have no nasal blockage and no signs of sleep apnea, and still want to experiment, keep it cautious. Ask your clinician whether it’s reasonable for you, and only try it when your nose is fully clear. Use a small, gentle strip that you can easily remove, rather than covering your whole mouth. Skip it on any night you’re congested, have been drinking or have taken anything sedating, and stop if it makes you anxious or you wake up feeling worse.

And be honest about the payoff. The research doesn’t show clear benefits for healthy sleepers, so the most likely result is that you sleep about the same. If you track your sleep with a wearable, keep in mind that consumer devices are better at detecting sleep and wake than at judging sleep quality, as we explain in our look at how accurate the Oura Ring is.

What to do tomorrow morning

1. Notice how you wake up. Dry mouth, a headache or feeling exhausted after a full night are worth writing down.
2. Ask a partner or roommate whether you snore loudly or seem to stop breathing at night. A snoring-recording app can also help you notice patterns to bring to a doctor.
3. If any red flags apply, book a doctor’s appointment and ask about a sleep study, instead of reaching for tape.
4. If your nose is often blocked, start there. Talk to a pharmacist or doctor about congestion, and consider nasal strips for comfort.
5. Work on the basics that are proven to help mornings: a consistent wake time and daylight soon after waking. Our science-backed morning routine and guide to becoming a morning person are good places to start.