Does Mouth Tape Help With Snoring? What the Studies Show
The evidence is small studies in people with mild sleep apnea, and a 2025 review rated them all poor quality. What was measured, where it stops, and when snoring means seeing a doctor.
Maybe a little, for a narrow group, and nobody has shown it works for snoring in general. The best evidence is a handful of small studies in people who already had mild sleep apnea and breathed through their mouths at night. A 2025 systematic review in PLOS One rated all ten studies it included as poor quality and concluded that the data "does not support mouth taping or oral occlusion as a sound clinical intervention for the general population with sleep disordered breathing."
Snoring is a sound, not a diagnosis. For some people it's a noisy nose and a sleeping position. For others it's the first sign of sleep apnea. Taping your mouth can't tell you which one you have, so this page covers what the studies measured, where they stop, and when to see a doctor.
Loud snoring, gasping or choking at night, pauses in breathing that a partner has noticed, or waking up unrefreshed and sleepy during the day can point to sleep apnea. That needs a proper sleep test, not a strip of tape. And if your nose is blocked, taping your mouth is the wrong move.
What do the studies on mouth tape and snoring show?
Two small studies tested tape or a patch against snoring. Both enrolled adults with mild sleep apnea (an apnea-hypopnea index under 15) who were mouth breathers. Neither had a control group.
- Lee and colleagues, 2022: 20 patients, 19 of them men, with a main complaint of snoring. A home sleep test a week later, taped, showed the median snoring index falling from 303.8 to 121.1 events per hour, and 13 of the 20 had at least a 50% drop. The authors note a small sample, no control group, no way to rule out a placebo effect, and a short follow-up.
- Huang and colleagues, 2015 (as reported in the review): 30 patients with snoring and mouth breathing wore a porous oral patch. Median snoring index went from 146.7 to 40. The authors say the study "does not define the safety or efficacy" because it was a small single-institution case series without a control group.
A third, larger result comes from a different group of people. In a 2025 randomized crossover trial of 62 adults with sleep apnea who were already using CPAP, mouth tape increased how long they used their CPAP machine, and their self-rated snoring improved. The abstract also notes that adverse effects were reported. That tells you something about people on CPAP, not about someone who snores and has never been tested.
Small studies in mild sleep apnea measured lower snoring scores while the mouth was taped. No study in the review tested the general public, and the reviewers judged every included study poor quality. "Snoring went down in 20 to 30 people" is not the same as "mouth tape helps snoring."
Why would closing your mouth change snoring at all?
The idea is that mouth breathing goes with a narrower airway and more collapse at the sides of the throat and the base of the tongue, which is what the review's sources describe. Three studies in the review found more space in the throat once mouth breathing stopped, though two of them measured it with the person awake and lying on their back, not asleep.
It doesn't work that way for everyone. The review also describes a study of 54 people with sleep apnea, tested under sedation with a scope. For 32 who breathed a moderate amount through their mouths, closing the mouth added airflow. For the 12 who breathed the most through their mouths, it reduced airflow. The reviewers write that forced mouth closure during sleep is not universally beneficial.
Does mouth tape help with sleep apnea?
No, not as a stand-in for a diagnosis or for CPAP. The reviewers say the studies "do not lend strong support" to mouth taping for improving sleep apnea. In the Lee study, the authors write that mouth taping is not recommended for moderate or severe sleep apnea because it may impose dangers rather than benefits. If you think you have apnea, get tested, and let a clinician decide what treats it.
Is it risky to tape your mouth if you snore?
It can be. Four of the ten studies in the review discussed a serious risk of suffocation or aspiration if you have nasal obstruction or you vomit while your mouth is covered. Many of the studies excluded people with nasal obstruction, so their results can't be read as "safe for a stuffy nose." A blocked nose is a common reason people breathe through their mouths at night, which is exactly the case the studies screened out. Our guide on whether mouth tape is safe covers who should skip it.
What should you do about snoring instead?
Start by finding out what kind of snoring it is. A clinician can look at your nose and throat, ask about your sleep position, and decide whether a sleep test makes sense. If it turns out to be simple snoring, you'll have other options to weigh with them. If it turns out to be apnea, you'll be choosing among treatments that have actually been tested for it.