“Mouth taping improves sleep quality”

Mouth taping means sealing the lips with tape or an adhesive patch at night to force breathing through the nose. Two independent reviews published in 2025 pulled together the entire published literature on the practice, and both landed in the same place: there is very little of it, and what exists does not agree [1][2].

The first was a scoping review, a survey that maps what research exists rather than pooling the results. Out of 177 studies identified, only nine had ever tested mouth taping during sleep [1].

The second was a systematic review, which follows formal search and screening rules. It found ten studies covering 213 patients in total, two of which showed better sleep apnoea measures with taping while the rest showed no difference [2].

What those nine studies actually measured is the telling part. The scoping review reports two that looked at obstructive sleep apnoea readings, one at snoring in people without sleep apnoea, one at asthma, and one at air leaking from the mask during assisted breathing at night [1].

None of them measured sleep quality in ordinary sleepers, which is precisely the group buying tape because of social media. On TikTok, better sleep was the single most common benefit claimed for the practice [1].

Within the medical group there is a signal worth naming. In a preliminary study of 20 mouth-breathers with mild sleep apnoea, one week of taping lowered the number of times breathing paused or became shallow from 8.3 to 4.7 an hour, and cut the snoring count by 47%, with 13 of the 20 counted as good responders [3].

That study was small and had no comparison group: every participant was measured once before taping and once a week later with the mouth taped, so there was no untaped group to compare against [3]. It points to a possible use in one specific patient group, not to proof for the general public.

The safety point is the one both review teams make loudly. The systematic review concluded there is a potentially serious risk of harm for people taking this up indiscriminately, including asphyxiation, meaning suffocation, if the nose is blocked [2].

Many of the published studies deliberately excluded anyone with a blocked nose or other nasal disease, so even the modest benefits they report cannot be read across to people who cannot breathe freely through the nose [2]. The same caution applies to anyone with moderate or severe sleep apnoea.

Until properly controlled trials in ordinary sleepers are done, mouth taping remains an unproven habit with a plausible-sounding rationale and a genuine safety catch. Both review teams ended their papers with the same request: more high-quality research is needed [1][2].