Quick Answer: Nose strips work by using a spring-loaded adhesive band to physically pull the sidewalls of your nostrils outward. This widens the nasal valve, the narrowest point in your airway, which accounts for over 50 percent of total nasal resistance. The wider opening counteracts the Bernoulli effect that causes nasal collapse during strong inhalation. The result is reduced resistance and easier airflow, though the strip treats only the valve itself, not deeper causes of congestion.
In This Guide
Reading Time: 7 minutes
You have probably seen the adhesive strips in every pharmacy, watched athletes wear them on television, and maybe even tried one yourself. Most people can feel that the strip opens their nose wider. What is less obvious is why that small mechanical change matters, what is happening inside your nasal anatomy when you apply one, and where the limits of that mechanism lie.
At Mattress Miracle in Brantford, customers ask us about nasal strips as part of the broader conversation about breathing at night and sleep quality. Understanding how they work helps explain when they help and when you need a different approach.
The Anatomy Strips Target
To understand how a strip works, you need to know one piece of anatomy: the nasal valve.
The Nasal Valve
Your nasal airway is not a uniform tube. It narrows and widens at different points. The narrowest point is the nasal valve, a triangular space located just inside each nostril, roughly 1.3 centimetres from the nostril opening. This valve is formed by three structures: the upper lateral cartilage above, the septum (the wall between your nostrils) on the inside, and the head of the inferior turbinate on the outer side.
The nasal valve is tiny. In most adults, the cross-sectional area measures between 55 and 83 square millimetres per side. Despite its small size, this area accounts for more than 50 percent of total nasal airway resistance, according to research published in the Brazilian Journal of Otorhinolaryngology by Nigro and colleagues.
The Bernoulli Effect in Your Nose
When air flows through a narrow passage, it speeds up. As it speeds up, the pressure it exerts on the walls drops. This is the Bernoulli principle, the same physics that allows airplane wings to generate lift. In your nose, air entering the nasal valve accelerates to roughly five times its speed at the nostril opening. That speed increase creates a suction effect on the soft lateral walls, pulling them inward. In healthy noses, the cartilage is rigid enough to resist this pull. But in people with weaker cartilage or already-narrow valves, the walls partially collapse during strong inhalation. This is what a nasal strip is designed to counteract.
External vs Internal Valve
The nose actually has two valve regions. The external valve sits at the nostril opening (the naris), formed by the alar cartilage (the flexible flared part of your nose you can pinch). The internal valve sits deeper, at the isthmus nasi, formed by the stiffer upper lateral cartilage. A standard adhesive strip primarily targets the external valve by pulling the alar sidewalls outward. Some wider or longer strip designs may also affect the internal valve slightly, but their main action is at the nostril rim.
How the Strip Mechanism Works
The Spring Element
An external nasal strip is a flexible band of fabric or plastic with one or two thin embedded spring-like strips running along its length. These springs are typically made of polyester or a similar material that has a natural tendency to straighten from a curved shape. When you press the strip across your nose, you are bending these springs against their natural shape. The springs constantly try to return to straight, which creates a gentle lifting force on the skin and cartilage beneath them.
The Adhesive
The underside of the strip is coated with a medical-grade adhesive strong enough to grip skin through a full night of sleep, head movement, and the moisture that builds up on your face. The adhesive serves as the anchor. Without it, the spring would simply straighten and fall off. The adhesive transfers the spring force to your skin, which transfers it to the underlying cartilage.
Step by Step
When you apply a strip correctly:
- You clean and dry the bridge of your nose so the adhesive bonds properly.
- You position the strip across the widest part of the nostrils, centred on the bridge.
- You press firmly for 10 to 15 seconds to set the adhesive.
- The embedded springs begin pulling outward, lifting the soft tissue of the alar sidewalls.
- The nostril openings widen by roughly 1 to 3 millimetres on each side.
- The cross-sectional area of the nasal valve increases, reducing airflow resistance.
That 1 to 3 millimetre change sounds small. But because the nasal valve is already the tightest point in the airway, even a modest widening can produce a noticeable change in airflow perception.
What Changes in Your Airway
Reduced Resistance
Airflow resistance through a tube follows the physics of laminar flow, where resistance is inversely proportional to the fourth power of the radius. In practical terms, this means that a small increase in diameter produces a disproportionately large decrease in resistance. Widening the nasal valve by even 10 percent can reduce resistance by roughly 30 to 40 percent at that specific point. You feel this as easier breathing through the nose.
Less Collapse During Inhalation
The spring tension of the strip provides structural support to soft lateral nasal tissue. During strong inhalation (breathing in deeply, snoring, or breathing during exercise), the Bernoulli suction effect intensifies. The strip counteracts this by mechanically holding the walls apart. People with weak alar cartilage benefit most from this function.
Shift from Mouth to Nose Breathing
When nasal resistance is high, the body defaults to mouth breathing, particularly during sleep when conscious control is absent. By lowering nasal resistance, a strip can shift the balance back toward nasal breathing. This matters for sleep quality because nose breathing filters, warms, and humidifies incoming air. Mouth breathing dries the throat and can contribute to snoring and airway vibration.
Brad, Owner since 1987: "I explain it to customers this way: the strip is a splint for your nose. It holds the floppy parts open the way a brace holds a weak ankle steady. If the problem is a floppy valve, the splint helps. If the problem is swelling deep inside or a blockage in your throat, the splint does nothing because it is in the wrong place."
8 min read
Types of Nasal Dilators Compared
External adhesive strips are the most common type, but they are not the only nasal dilator. Understanding the differences helps you choose the right one.
| Type | How It Works | Where It Acts | Pros | Cons |
|---|---|---|---|---|
| External adhesive strip (Breathe Right) | Spring band lifts nostrils from outside | External nasal valve | Easy to use, disposable, no insertion needed | Adhesive irritation, single use, may detach overnight |
| Internal nasal dilator (Mute, Turbine) | Plastic prongs push nostrils open from inside | Internal and external valve | Reusable, stronger dilation, reaches both valves | Insertion discomfort, takes getting used to |
| Nasal clip (magnetic) | Small magnets press septum to widen passages | Varies by design | Reusable, no adhesive | Limited evidence, can slip during sleep |
| Nasal tape (mouth taping adjacent) | Tape over mouth encourages nose breathing | Indirect, does not widen valve | Forces nasal breathing habit | Does not address obstruction, risky if congested |
A 2019 study by Gelardi and colleagues in Acta Biomedica compared internal dilators against external strips in 41 snoring patients. Both types reduced snoring compared to no treatment. Internal dilators performed slightly better and were preferred by more participants, possibly because they affect both valve regions.
What Strips Cannot Do
Understanding the mechanism also explains the limitations. A strip acts only on the nasal valve at the front of your nose. It cannot:
- Reduce swelling of turbinates (deeper tissue inside the nose that swells from allergies, colds, or dry air)
- Clear mucus or thin secretions blocking the passages
- Correct a deviated septum (a structural issue requiring surgery)
- Open the throat (where most snoring and all sleep apnea obstruction occurs)
- Treat inflammation caused by allergies, sinusitis, or irritants
If your breathing problem is caused by any of these, you need a different approach. A humidifier and allergen-proof protector address dry air and dust mites. A saline rinse clears mucus. An adjustable bed base or wedge pillow reduces the gravitational blood pooling that swells nasal tissue when you lie flat. Our white glove delivery team at Mattress Miracle sets up adjustable bases so you can test the angle on your first night.
For snoring that comes from the throat rather than the nose, a mandibular advancement device (anti-snoring mouthguard) positions the jaw forward to open the airway behind the tongue. For suspected sleep apnea, medical evaluation is necessary.
Testing the Mechanism at Home
You can test whether a strip will help before buying one. Place two fingers on the sides of your nostrils and gently pull outward while breathing in through your nose. If airflow improves noticeably, a strip will reproduce that same effect. If pulling outward makes no difference, the resistance in your airway is deeper than the valve, and a strip will not address it. This test mimics exactly what the strip does mechanically, just using your fingers instead of a spring band.
Sources
- Nigro, C.E.N., et al. "Nasal Valve: anatomy and physiology." Brazilian Journal of Otorhinolaryngology, vol. 75, no. 2, 2015, pp. 305-310. doi:10.1016/S1808-8694(15)30795-3.
- Gelardi, M., et al. "Internal and external nasal dilator in patients who snore: a comparison in clinical practice." Acta Biomedica, vol. 90, no. 2-S, 2019. doi:10.23750/abm.v90i2-S.8096.
- Camacho, M., et al. "Nasal Dilators (Breathe Right Strips and NoZovent) for Snoring and OSA: A Systematic Review and Meta-Analysis." Pulmonary Medicine, 2016. doi:10.1155/2016/4841310.
- Naclerio, R.M., et al. "Pathophysiology of nasal congestion." International Journal of General Medicine, vol. 3, 2010, pp. 47-57.
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441 1/2 West Street, Brantford, Ontario
Call 519-770-0001Frequently Asked Questions
What part of the nose does a nasal strip open?
A nasal strip opens the nasal valve, which is the narrowest part of the nasal airway located about 1.3 centimetres inside the nostril. This valve is formed by the upper lateral cartilage, the septum, and the inferior turbinate. The valve accounts for more than half of your total nasal airway resistance, which is why even a small widening can feel significant.
Do nose strips work by reducing nasal swelling?
No. Nose strips are purely mechanical. They physically hold the nostril walls apart using a spring element. They do not reduce inflammation, thin mucus, or shrink swollen tissue. If your congestion is caused by swollen turbinates from allergies or a cold, you need an anti-inflammatory solution (like a steroid spray) or environmental changes (like a humidifier). Strips bypass swelling by opening a different part of the airway.
Why do nose strips sometimes fall off during the night?
The adhesive bond weakens when the skin becomes oily or moist. Facial oils produced during sleep, perspiration from a warm bedroom, or moisturizer applied before bed can all reduce adhesion. For the best hold, wash and thoroughly dry the nose with soap before applying the strip. Avoid applying moisturizer or sunscreen to the bridge of the nose at bedtime.
Are internal nasal dilators more effective than external strips?
A 2019 head-to-head study found that internal dilators reduced snoring in a higher percentage of patients than external strips. Internal dilators sit inside the nostrils and push outward, affecting both the internal and external nasal valves. External strips only reach the external valve. However, both types improved breathing compared to no treatment, and personal comfort plays a large role in which option works best long-term.
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Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
A nose strip targets one piece of the breathing puzzle. If nighttime congestion or snoring is affecting your sleep, your head position, mattress angle, and bedroom air quality all play roles that no strip can address. Stop in and talk to us about adjustable bases, pillow options, and allergen-proof protectors that work alongside whatever nasal solution you choose. Helping Brantford families sleep better since 1987.
Related Reading
- Do Nose Strips Work? An Honest Look at the Research
- Does a Nose Strip Work? What Marketing Claims Miss
- Best Nose Strips for Sleep and Breathing
- Clogged Nose Remedy: What Works Fast
- How to Get Rid of a Stuffy Nose: Methods That Work Tonight
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Mattress Miracle , 441½ West Street, Brantford, ON · (519) 770-0001
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