Why do I snore with my mouth closed?

If you snore with your mouth closed, the sound is coming from somewhere other than an open mouth: usually your nose, your soft palate or your tongue. A blocked nose, sleeping on your back, a drink before bed and extra weight can all make it worse. The upside is that each of these has its own fix, and working out which applies to you is mostly a matter of a few checks at home.

Can you snore with your mouth closed?

Yes, and plenty of people do. The NHS explains that snoring is caused by the tongue, mouth, throat or nasal airways vibrating as you breathe, because these parts relax and narrow when you're asleep. An open mouth is one way to narrow the airway, but it's far from the only one.

A simple home test helps confirm what you're dealing with. Make a snoring noise with your mouth open, then close your mouth and try again. If you can still snore with it closed, your snoring likely involves your nose, soft palate or tongue. Our guide to nose snoring vs mouth snoring walks through this test and two others.

What causes snoring with your mouth closed?

The causes of snoring are well documented, and most of them work whether your mouth is open or shut. Here are the main ones, with what each points to.

Your nose

A blocked nose can lead to snoring even with your mouth closed. Cleveland Clinic says that if your nasal passages are partly blocked, you have to make an extra effort to pull air through them, which can pull together or collapse soft, dangling tissue and cause snoring. It lists a deviated septum and nasal polyps among the causes of that kind of blockage. Its main snoring page adds that congestion from allergies and colds can block airflow, and that hormone changes during pregnancy can also contribute.

A German medical guideline on snoring in adults explains the mechanism. It says the nose itself generally can't vibrate because the nasal skeleton is too stable, but impaired nasal breathing can be a co-factor in snoring elsewhere, such as at the soft palate. A 2014 case series in Sleep and Breathing shows the pattern. Of 25 people with swollen nasal turbinates, the ridges inside the nose, 17 snored while breathing through the nose and snored less when they breathed through the mouth.

For more on specific nose problems, see our guides to turbinate hypertrophy and deviated septum symptoms.

Your soft palate and uvula

The soft palate is the soft back part of the roof of your mouth, and the uvula is the small piece of tissue that hangs from it. Cleveland Clinic says that if the roof of your mouth is longer or softer than usual, or your uvula is longer, the opening from your nose to your throat can be narrower, and these tissues can vibrate and bump against each other as you breathe. That happens regardless of whether your lips are sealed. Our guide to a long uvula and snoring has more.

Your tongue and sleep position

Cleveland Clinic says sleeping on your back is more associated with snoring than other positions, because your tongue can relax toward the back of your throat and partly block the airway. A 2003 sleep lab study of 72 habitual snorers found that most of those without sleep apnea snored less on their side, both in how long and how loudly they snored. People with sleep apnea had more varied results. Our guide to sleep position and snoring covers ways to stay on your side.

Alcohol and sedatives

Alcohol relaxes the muscles that hold your airway open. Cleveland Clinic says alcohol, sedatives and even lack of sleep can relax the upper airway muscles and lead to snoring. A 2020 meta-analysis of 13 studies with 279 people found alcohol was associated with worse snoring, a higher apnea-hypopnea index and lower oxygen levels in people prone to snoring and sleep apnea. See alcohol and snoring for timing tips.

Weight

Cleveland Clinic says snoring is more common in people with overweight or obesity. A small 1995 study in Chest followed 19 men who snored heavily through a six-month weight loss program. The nine who lost 3 kg or more cut their snoring from 320 to 176 snores an hour, and the authors concluded the main effect came from the weight loss. Our guide to weight loss and snoring has more.

Why might mouth tape alone not help?

Mouth tape does one job: it keeps your mouth closed so you breathe through your nose. That helps when your snoring comes from an open mouth. If you already snore with your mouth shut, the vibration is coming from your nose, soft palate or tongue, and tape doesn't reach any of those.

Tape can still be part of the picture if your mouth also falls open at times, since it's possible to have more than one type of snoring. But tape relies on a clear nose. Cleveland Clinic says you should never use mouth tape if you have nasal obstruction or congestion, chronic allergies, sinus infections, enlarged tonsils or a deviated septum. If you've tried tape and still snore, our guide on still snoring with mouth tape goes through the next steps.

What can you try for closed-mouth snoring?

Start with the cause that fits best. The NHS recommends simple lifestyle steps for everyone who snores: losing weight if you're overweight, sleeping on your side, not smoking, not drinking too much alcohol and avoiding sleeping pills, which can sometimes cause snoring.

For a blocked or narrow nose, the NHS lists nasal strips or dilators that hold the nose open, and decongestants or sprays that reduce swelling. In a 2000 randomized, placebo-controlled trial in 12 people with chronic rhinitis, those given a nasal dilator strip averaged 173 snores an hour, compared with 258 for those given a placebo strip, though loudness didn't change. Our guide on how to sleep with a stuffy nose has more ways to clear things before bed.

For tongue-related snoring, the NHS lists a mouth device that brings the tongue forward. For soft palate problems, the German guideline says a suitable minimally invasive procedure can be considered for certain anatomical abnormalities, which is a conversation for an ear, nose and throat specialist.

When should you see a doctor?

See a GP or doctor if lifestyle changes aren't helping or your snoring has a big impact on you or your partner. The NHS says to get checked if you feel sleepy in the day, your breathing stops and starts while you sleep, or you make gasping or choking noises, because these may be signs of sleep apnoea, which can be serious if not treated. Our guides to snoring vs sleep apnea and sleep apnea warning signs explain the difference.

It's also worth seeing a doctor if your nose is blocked most nights, since a deviated septum, polyps or swollen turbinates may need their own treatment. If you're pregnant and snoring has started or got worse, mention it to your midwife or doctor, and ask before trying new snoring products. We don't recommend mouth tape for children.

Our pick (paid partner): TitanAir Nasal Strips

If your snoring seems to start in your nose, our pick is TitanAir Nasal Strips. We haven't tested or ranked nasal strips ourselves, and Titan's strips weren't used in the studies above. This is our recommendation, and strips won't help snoring that comes from the tongue or soft palate alone.

Titan describes them as drug-free external nasal dilators with flexible spring-loaded bands. It says they go just above the flare of the nostrils, on the soft part of the nose rather than the bony bridge, on clean, dry skin without moisturizer. To remove one, Titan suggests loosening it with warm water and peeling slowly from the ends inward.

They're designed to pair with mouth tape if your mouth also falls open later in the night, which Titan offers together as the Titan Sleep System. Titan says every batch is third-party tested and certified PFAS-free, with a 30-night guarantee.

Read next

• Does mouth breathing cause snoring?
• How snoring happens
• 10 reasons you snore, and what to try for each

* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.