Nasal Valve Collapse: Symptoms, the Cottle Test and Treatment

The nasal valve is the narrowest part of the entire airway. It is the point at which air moving into the nose is at its fastest and the pressure inside the nose is at its lowest — and where the sidewall of the nose is most likely to buckle inward. When it does, breathing through that side becomes an effort no decongestant will fix.

Nasal valve collapse is under-diagnosed, largely because it is invisible at rest. The nose looks normal, the septum may be straight, and a standard examination can miss it entirely. It only reveals itself when you breathe in.

If you have ever found that pulling your cheek gently outward makes breathing dramatically easier, or that a nasal strip works better for you than any spray, that is the nasal valve. This guide explains what it is, how to test for it yourself, and what can be done — including where it overlaps with a deviated septum, enlarged turbinates and the surgery used to correct them. Where valve support is needed, it is usually addressed during septorhinoplasty or functional rhinoplasty rather than as a standalone operation.

What Is the Nasal Valve?

There are two, and the distinction matters because they collapse for different reasons and need different repairs.

The internal nasal valve sits higher up, formed by the angle between the septum and the upper lateral cartilage, with the head of the inferior turbinate at its floor. That angle is normally 10 to 15 degrees. Narrow it and airflow resistance rises sharply — this is the commonest site of nasal valve collapse and the most significant, because it accounts for the majority of total nasal airway resistance.

The external nasal valve is the nostril opening itself, bounded by the lower lateral cartilage, the columella and the nostril rim. Collapse here shows as the nostril rim drawing inward on inspiration, and is more common in people with thin or weak lower lateral cartilage, or after previous surgery.

Many people have both. Assessment needs to establish which, because widening the internal valve does nothing for a collapsing nostril rim, and vice versa.

What Nasal Valve Collapse Looks Like

From the outside, often nothing — which is why the condition is missed so frequently. Watch closely during a deep breath in and you may see the side of the nose or the nostril rim pull inward and narrow. In more marked cases it is visible in the mirror; in milder ones only under examination.

This is a mechanical problem, not an inflammatory one. Nothing is swollen and nothing is infected, which is exactly why steroid sprays, antihistamines and decongestants do so little. Patients often arrive having tried all three, having been told their nose looks fine.

Nasal Valve Collapse Symptoms

• Blocked nose that sprays do not touch — the single most telling feature
• Obstruction that worsens on deep or fast breathing, particularly during exercise, when the airway needs to be widest
• Nasal strips help noticeably — they work by holding the sidewall out
• Breathing improves when you pull the cheek outward
• Mouth breathing, dry mouth on waking, and disturbed sleep
• Snoring, and difficulty tolerating CPAP where sleep apnoea is present
• Sensation of blockage that shifts side to side with the natural nasal cycle

The pattern that distinguishes valve collapse from other causes is the worse you need to breathe, the worse it gets. Gentle breathing may feel fine; a hard run is impossible through the nose.

The Cottle Test: Checking It Yourself

The Cottle test is a simple manoeuvre that gives a strong indication in seconds.

1. Breathe in through your nose normally and note how it feels.
2. Place two fingertips on the cheek beside your nose and draw the cheek gently outward and away from the nose — not upward, and not pressing on the nose itself.
3. Breathe in again.

If the second breath is clearly easier, the test is positive and nasal valve collapse is likely. Test each side separately; a positive result on one side only is common and useful information.

The Cottle test has a known weakness: by pulling on the cheek it also drags on nearby tissue, which can produce a false positive. The modified Cottle test is more specific — a cotton bud or the tip of an instrument is used to support the sidewall directly at the valve without disturbing anything else. That is done at examination rather than at home.

A positive Cottle test is a reason to be assessed. It is not a diagnosis on its own.

What Causes Nasal Valve Collapse

• Previous rhinoplasty — the commonest acquired cause by some distance. Removing or over-narrowing cartilage, particularly reduction of a dorsal hump without reconstructing the roof of the nose, weakens the internal valve. This can appear years after otherwise successful surgery, and is a frequent reason for revision rhinoplasty.
• Trauma — a broken nose that healed with the sidewall displaced or the cartilage weakened.
• Congenital narrowness — naturally narrow valve angles, thin cartilage, or narrow nostrils. Often noticed first in the teens or twenties during sport.
• A deviated septum — deviation at the front of the septum narrows the valve angle directly, which is why the two are so often found together.
• Ageing — cartilage loses stiffness and the tip drops with time, narrowing the valve. A gradual worsening over decades with no injury is typical.
• Facial nerve weakness — loss of tone in the muscles that stabilise the sidewall, as after facial palsy.

Can Nasal Valve Collapse Heal on Its Own?

No. This is a structural problem — the cartilage supporting the airway is either too weak or positioned too narrowly, and neither corrects itself. Unlike swelling from allergy or infection, there is no inflammatory process to settle.

What can change is how much it bothers you. Symptoms fluctuate with the nasal cycle, with allergy load and with activity, so some days feel better than others. That variability leads people to assume it is improving when the underlying anatomy is unchanged.

The practical distinction: swelling that responds to a decongestant is mucosal and treatable medically. Obstruction that does not respond, but improves when you hold the sidewall out, is structural and will not resolve without support.

How It Is Diagnosed

Assessment begins with history — particularly any previous nasal surgery or injury — followed by examination of the nose at rest and during forced inspiration, which is when collapse appears.

Nasal endoscopy allows the internal valve, septum and turbinates to be seen directly. Modified Cottle testing confirms which valve is involved and how much support is needed. Where the picture is complex or previous surgery has altered the anatomy, imaging may be added.

The point of assessment is not simply confirming collapse. It is establishing everything contributing to the obstruction, because valve collapse very often coexists with a deviated septum and enlarged turbinates. Correcting one and leaving the others is the commonest reason surgery disappoints.

Non-Surgical Options

There is no medication that treats nasal valve collapse, because nothing is inflamed. What exists are mechanical supports:

• External nasal strips — adhesive springs that pull the sidewall outward. Genuinely effective for many people, and their effectiveness is itself diagnostic. Suitable for sleep and exercise rather than continuous use.
• Internal nasal dilators — small devices worn inside the nostrils. A nasal valve dilator supports the airway from within and some people tolerate them well overnight.
• Treating coexisting inflammation — where allergic rhinitis or turbinate swelling is adding to the obstruction, a steroid spray will not fix the valve but may improve the total airway enough to matter.

These manage symptoms; they do not correct the anatomy. For many people that is a reasonable long-term choice and surgery is unnecessary.

Nasal Valve Repair Surgery

Surgical repair supports or widens the valve using cartilage grafts, usually taken from the septum, or from the ear or rib where septal cartilage is unavailable after previous surgery.

• Spreader grafts — thin strips of cartilage placed between the septum and the upper lateral cartilage on each side, widening the internal valve angle. The workhorse of internal valve repair, and routinely placed during rhinoplasty to prevent collapse after hump reduction.
• Alar batten grafts — curved cartilage placed along the sidewall to stiffen it against collapse. Used for external valve and lateral wall collapse.
• Lateral crural strut grafts — cartilage placed beneath the lower lateral cartilage to reposition and support a weak or malpositioned nostril rim.
• Flaring sutures and suspension techniques — sutures that widen or lift the sidewall, sometimes used alongside grafting.

Valve repair is rarely a standalone operation. It is performed as part of septorhinoplasty or functional rhinoplasty, frequently alongside septoplasty and turbinate reduction, so the whole airway is addressed together.

Will it change how my nose looks?

Possibly, slightly. Spreader grafts can subtly widen the middle third of the nose — usually imperceptible, occasionally visible in a very narrow nose. Alar battens can add a small amount of fullness at the sidewall. Any expected change is discussed and planned before surgery rather than discovered afterwards, and for most people the trade is straightforward: a marginal change in appearance against being able to breathe.

Recovery

A day-case procedure under TIVA. Expect a blocked, congested nose for the first one to two weeks as swelling settles — often feeling worse before better. Most people return to desk work within a week to ten days, and to full exercise at four weeks. Where nasal bones have been repositioned a splint is worn for a week. Breathing improves progressively over two to three months as internal swelling resolves.

Nasal Valve Collapse and the NHS

Nasal valve surgery is available on the NHS where obstruction causes documented functional impairment, though access varies considerably between areas and many integrated care boards apply threshold criteria. Where previous cosmetic rhinoplasty caused the collapse, NHS funding is less likely. Your GP is the route to referral and can advise on local policy.

Cost

Valve repair is performed as part of septorhinoplasty or functional rhinoplasty rather than alone, so cost depends on which procedures are combined, whether grafts are taken from the ear or rib, and the anaesthetic required. Your exact cost is confirmed in writing following in-person consultation and examination. Finance is available through Chrysalis Finance, subject to status — see our finance options.

Nasal Valve Collapse FAQs

Nasal Airway Assessment at Centre for Surgery

Nasal airway assessment at Centre for Surgery is led by our ENT surgeon and rhinologist. Nasal valve collapse is missed often enough that it is worth being examined by someone who looks for it specifically — during forced inspiration, with endoscopy, and with modified Cottle testing to establish which valve is involved.

We will tell you plainly if a nasal strip or dilator is a reasonable answer for you, and if your obstruction is mucosal rather than structural we will say that too.

All surgery is performed by GMC-registered surgeons at our own day-surgery facility at 95–97 Baker Street, Marylebone. We are regulated by the Care Quality Commission and rated Good overall. We recommend a two-week cooling-off period before any surgery is booked.

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Related Reading

• Saddle nose deformity: early signs, causes and reconstruction
• Septorhinoplasty
• Septoplasty (deviated septum surgery)
• Turbinate reduction surgery
• Revision rhinoplasty
• Nasal turbinates: why they swell and how they are treated
• What is a deviated septum?
• Snoring and sleep apnoea
• Narrow nostril surgery for breathing difficulties
• Common reasons for a collapsed nostril
• Alar rim retraction