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Nasal dilators: Strips or internal inserts?

Clinical review pending

How nasal strips and internal inserts can ease breathing, what research shows about snoring and exercise, and why they do not replace sleep apnea treatment.

Loose gray shapes enter a clear prism and become three blue light bands.

Nasal dilators can make breathing through the nose feel easier straight away when narrowing around the nasal valve is part of the problem. Some people snore less or feel more comfortable during exercise. That does not make a dilator a reliable performance aid or a treatment for obstructive sleep apnea. What matters is where the airway narrows and which outcome you want to improve.

What nasal dilators are

External nasal strips gently pull the sides of the nose outward. Internal dilators sit inside the nostrils as small supports. Both aim to widen the passage at the front of the nose. They work mechanically and usually contain no decongestant medication.

Mouth tape, CPAP, surgery for a deviated septum, and nasal corticosteroid sprays have different purposes. A dilator does not treat allergic inflammation, for example, and opening the nose does not automatically stabilize a throat that collapses during sleep.

How the mechanical effect works

The nasal valve is a narrow part of the nasal airway. During inhalation, flexible sidewalls may be pulled inward and make the passage narrower still. An external strip applies outward tension; an internal insert supports the area from within. Research on nasal dimensions and airflow describes this approach.

Responses vary. Someone with narrowing in this region may benefit more than someone whose snoring mainly originates in the soft palate or throat. Easier breathing is a meaningful comfort outcome, but it is not the same as a large objective improvement in physical performance.

Comparing internal and external models

A comfortable fit matters more than maximal widening. External strips need to adhere in the intended position without stressing the skin. Internal models should remain secure without pressure or pain. Available sizes vary by manufacturer; a “universal fit” should not be assumed to work for everyone.

For strips, adhesive tolerance matters. For inserts, look at size, smooth surfaces, cleaning requirements, and the intended duration of use. Labels such as medical-grade silicone or latex-free can help identify materials, but they do not guarantee individual tolerance. A device worn for several hours, such as a 6-to-9-hour night, must be intended for that use; this is not a recommended sleep duration or a universal device wear limit.

An open clinical comparison in 41 people who snored found improvements with both an internal device and an external strip, with some results favoring the internal device. Snoring was assessed by smartphone and sleep quality by self-report. This is not enough to establish a general ranking of all internal and external products. Sensitive facial skin may favor an internal option, while sensitive nasal lining may favor an external one. Any regulatory status also needs to match the specific intended use; it is not evidence that the device treats sleep apnea.

What research shows about the main claims

Less snoring when nasal obstruction contributes

Some small studies, including research in people with chronic rhinitis, have found less snoring. A randomized trial in 12 nonobese snorers with chronic rhinitis and no sleep apnea found lower snoring frequency with an external strip. It did not improve snoring loudness, sleep quality, the arousal index, or the apnea-hypopnea index. Results vary with the participants and the measurement method. Nasal narrowing can be a useful target, but it does not explain all snoring.

Treating obstructive sleep apnea

A meta-analysis found no significant overall improvement in the apnea-hypopnea index, or AHI, with nasal dilators. A subgroup analysis suggested a small improvement in the apnea index with internal devices, but this did not establish effective treatment of obstructive sleep apnea overall. In a separate study of severe sleep apnea, nasal strips served as a placebo comparison with CPAP and did not significantly improve the sleep-study measurements. A clearer nose therefore does not replace appropriate sleep apnea treatment.

Better athletic performance

The results are mixed rather than uniformly negative. A 2021 review of external strips found no significant benefit for maximal oxygen uptake, heart rate, or perceived exertion in healthy people during exercise. A 2022 running-related review found signals favoring dilators for maximal oxygen uptake and perceived exertion, but rated the certainty of that evidence very low. Those findings leave room for a benefit while falling short of a reliable performance promise. 2021 review 2022 review

A small randomized crossover cycling study found no improvement in peak oxygen uptake, work rate, breathlessness, or the work of breathing. Another observational study in 38 endurance athletes found improvements among the 23 with nasal valve compromise, but not in those without it. That is a more specific signal in people with an identified obstruction, not evidence that every runner or cyclist will improve. Cycling study Nasal valve study

Breathing that feels easier during exercise

Some people find dilators more comfortable even when their speed or power does not change. The 2022 review found a signal for lower perceived exertion, alongside the oxygen-uptake finding, with very low certainty. Other studies have not found the same benefit. A subjective improvement can still be worthwhile; it should be described as a change in comfort or effort, not guaranteed endurance.

When a personal trial may make sense

A well-fitting dilator may ease airflow when temporary or established nasal narrowing is the main issue. If rhinitis is contributing, any needed treatment for inflammation remains relevant. A purely mechanical device is not expected to cause the medication-related rebound congestion associated with overused decongestant sprays.

For athletes, the goal may simply be more comfortable breathing. Switching to mouth breathing as exercise becomes harder is not automatically a sign of disease. In selected CPAP users, improving the nasal passage may also help comfort. A small study found a lower pressure requirement with an internal dilator; that does not prove better long-term adherence. It is an adjunct to CPAP, not a replacement, and pressure changes should be managed by the sleep team. CPAP study

Persistent one-sided obstruction, substantial structural problems, or recurring symptoms warrant an ear, nose, and throat assessment. Surgery is not automatically the next step. It depends on the findings, symptoms, and other treatment options.

Keeping a personal trial manageable

A brief record over about seven days can show how congestion, snoring, or exercise effort varies without a device. You can then compare a suitable product, used as directed, over several similar nights or exercise sessions. Mechanical support begins when the device is in place; it does not need weeks to build up in the body.

Two to four weeks of observation may help reveal ordinary variation, but this is a practical tracking suggestion rather than a validated treatment schedule. Stop if there is irritation, pain, a nosebleed, or worse breathing. Recurring symptoms need assessment. Do not wait until a trial ends if you notice breathing pauses, gasping, or substantial daytime sleepiness.

Who should be especially cautious?

Discuss internal inserts before use if you have had recent nasal surgery, an injury, active painful inflammation, or recurrent nosebleeds. An adhesive allergy or inflamed facial skin may make external strips unsuitable. An internal model is an alternative only if it is itself appropriate and comfortable.

Nasal symptoms can also occur during pregnancy. A study in 54 pregnant habitual snorers found no significant improvement in measures of sleep-disordered breathing with strips. This does not establish that strips are generally dangerous, nor does it establish an effective apnea treatment. New substantial snoring or breathing problems deserve assessment regardless of whether a strip makes the nose feel clearer. Pregnancy study

What regulatory claims and side effects mean

“FDA-cleared” refers to a particular US regulatory pathway and an intended use. It does not validate every sleep or exercise claim. Check the actual product and labeling rather than treating an entire category as an approved sleep apnea therapy. FDA

External strips can irritate the skin or damage it during removal, particularly if the skin is already sensitive, including from retinoid use. Internal devices can cause pressure, nasal-lining irritation, or nosebleeds. A bleeding history or anticoagulant use makes that concern especially relevant. Long-term evidence over months or years is limited. One cited tolerability trial covered seven consecutive nights, which cannot establish safety with indefinite use. Tolerability study

Which observations are useful?

If the goal is “my nose feels clearer,” your own perception is relevant. For snoring, a partner’s observations or a recording may add information without ruling out sleep apnea. The Epworth Sleepiness Scale measures the tendency to doze during the day; scores above 10, or 11 to 24, suggest increasing excessive daytime sleepiness. The score is not a diagnosis, and a lower score does not exclude sleep apnea. About the Epworth scale

Suspected sleep apnea needs appropriate sleep testing. An oxygen trend from a wearable does not replace an airflow measurement or the AHI. For exercise, you can compare perceived exertion, time, or power under similar conditions. Even then, an improvement in an individual trial does not establish that the device caused it.

How to interpret changes over time

Several comparable nights are more informative than one unusually quiet night. A change on a five-point snoring scale or the Borg 6-to-20 exertion scale depends on the measurement and the person. A rigid one-point threshold does not reliably separate a meaningful benefit from ordinary variation.

Keep the goal clear. More comfortable nasal breathing can be enough reason to value a device. Whether sleep apnea is being treated requires different evidence. A stronger or more expensive strip does not change that distinction.

When sleep medicine or an ENT assessment matters more

Observed breathing pauses, nighttime gasping, pronounced daytime sleepiness, and persistent heavy snoring are reasons to seek a sleep assessment. A persistently blocked nose merits an ENT evaluation. A dilator may complement care in selected cases, but should not delay looking for the cause.

Frequently asked questions

Do nasal dilators work?

They can make breathing easier when narrowing at the front of the nose is part of the problem. Snoring or perceived effort may improve, but responses differ between people and study findings are mixed.

Are they cleared by regulators?

That depends on the specific product and intended use. Clearance for temporary relief of nasal breathing difficulty is not evidence that a device treats sleep apnea.

How often can I use one?

Follow the product’s instructions for its intended use. Clean reusable inserts as directed, check for damage, and follow any replacement or wear-time limits.

Who should ask a clinician first?

People recovering from nasal surgery, those with injuries or recurrent nosebleeds, and anyone with unexplained breathing problems should seek advice. Possible sleep apnea requires its own assessment.

What do the studies show overall?

Nasal airflow and comfort have more direct support than reliable athletic gains or treatment of sleep apnea. Some exercise results are positive but very uncertain. Findings depend on the population, device, and outcome measured.

Are internal models better?

Some comparisons favor particular internal devices, but they do not establish a universal ranking. Fit, anatomy, and tolerance matter more than assuming one category is always superior.

How can I recognize a benefit?

Look for easier nasal breathing and, if relevant, a consistent comfort improvement over several comparable nights. Less snoring does not rule out breathing pauses or show that sleep apnea is controlled.

Are they safe every night?

They are often tolerated when the product is appropriate and used as directed, but long-term evidence is limited. Pain, damaged skin, or bleeding are not necessary adjustment symptoms and should not be ignored.

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