Rhinoplasty 101: Understanding Nasal Valve Collapse

Dr Scott J Turner | Specialist Plastic Surgeon (FRACS) | Sydney

Nasal valve collapse is a structural cause of nasal obstruction that produces difficulty breathing through the nose, particularly during deep inhalation, exercise, or sleep. It is one of the more under-recognised causes of ongoing breathing problems. Many patients with nasal valve collapse have been told they have allergies, have used nasal sprays without lasting benefit, or have had septal surgery without their breathing improving, before the actual structural cause is identified. Unlike a deviated septum, which involves the internal wall separating the nasal passages, nasal valve collapse involves the structural support of the nasal sidewall or the nostril rim. Septoplasty alone does not address it. The relevant surgical treatment is functional rhinoplasty Sydney, which uses structural cartilage grafts to restore the support that has been lost.

This article explains what nasal valve collapse is, how internal and external valve problems differ, how the condition is diagnosed at clinical examination, why septal surgery alone is not enough, and how the structural problem is corrected surgically. Dr Scott Turner is a Specialist Plastic Surgeon (FRACS) who consults with patients in Sydney about functional nasal surgery at his Bondi Junction and Manly clinics. AHPRA registration MED0001654827. A clinical assessment is required to identify which type of valve collapse is present and which surgical approach is appropriate.

What is nasal valve collapse?

The “nasal valves” are the narrowest parts of the nasal airway, where small changes in width have large effects on airflow resistance. There are two distinct valves on each side of the nose: the internal nasal valve (the deeper of the two, formed by the junction of the upper lateral cartilage with the septum and the inferior turbinate) and the external nasal valve (the nostril opening, supported by the alar cartilages on each side).

Nasal valve collapse occurs when the structural support at one or both of these valves is insufficient to keep the airway open during breathing. On gentle inhalation the valves stay open and airflow is normal; on deeper inhalation, the negative pressure generated by faster airflow draws the weakened sidewall or nostril rim inward, narrowing the airway. Breathing feels normal at rest but becomes blocked during exercise, sleep, or any time the body needs higher airflow.

This is a mechanical structural problem, not inflammation or allergies (though these can coexist). Nasal sprays, antihistamines, and saline rinses do not address the underlying weakness. The structural solution is functional rhinoplasty.

Internal vs external nasal valve collapse

The two types of valve collapse have different anatomical locations, different symptoms, and different surgical solutions. The table below summarises the distinction.

Many patients have a degree of both internal and external valve weakness, and the surgical plan addresses both where present. The clinical examination at consultation identifies which valves are involved and how severely, which determines the specific graft strategy.

How do you know if you have nasal valve collapse?

The symptoms of nasal valve collapse vary depending on which valve is involved and how severe the structural weakness is. Common patterns include:

• Breathing that feels worse on deep inhalation: Normal at rest, blocked when breathing harder or during exercise
• Exercise intolerance from nasal breathing: Many patients switch to mouth-breathing during exercise without realising why
• Visible nostril collapse on inhalation: External valve weakness; the nostril sidewall is pulled inward visibly with deep breaths
• One-sided or both-sided blockage: Often asymmetric, depending on which side has weaker support
• Mouth breathing at night: With associated snoring or disturbed sleep
• Symptoms that improve when pulling the cheek laterally: Suggests internal valve involvement
• Persistent obstruction despite previous septal surgery or medical treatment: Antihistamines, nasal sprays, and decongestants have not resolved the symptoms

These symptoms can overlap with septal deviation, allergic rhinitis, chronic sinusitis, and turbinate hypertrophy. Clinical examination is required to identify which structures are actually contributing to the obstruction. Where nasal valve collapse is the dominant cause, surgical correction by functional rhinoplasty is generally the most effective treatment.

What causes nasal valve collapse?

Nasal valve collapse develops through several distinct pathways:

Previous rhinoplasty is the most common cause seen in clinical practice. Where cartilage has been removed from the upper lateral cartilages (during dorsal reduction) or alar cartilages (during tip refinement) without replacing the structural support, the valves can collapse months or years later. This is a recognised problem with older reduction-focused techniques, and is the reason modern rhinoplasty emphasises structural preservation and grafting. Where valve collapse follows previous rhinoplasty, the appropriate pathway is often revision rhinoplasty.

Nasal trauma can disrupt the cartilage framework, leaving residual valve weakness even after the bones heal. A history of nasal fracture, contact-sport injury, or motor vehicle accident may produce valve collapse alongside or instead of septal deviation.

Congenital weakness of the alar or upper lateral cartilages produces valve collapse without any history of injury or surgery. Patients in this group often report having always had difficulty breathing during exercise.

Aging or constitutionally thin cartilage can contribute, as the supporting cartilages weaken or remain inherently weak over time. This explains some breathing problems that develop or worsen in midlife.

The cause matters because it shapes the surgical plan: post-rhinoplasty valve collapse may require different graft strategies than congenital weakness, because the available tissue and the scarring profile differ.

How is nasal valve collapse diagnosed?

Diagnosis is primarily clinical. There is no routine imaging test that reliably demonstrates nasal valve collapse, because the problem is dynamic (it occurs during breathing) rather than static. Two clinical tools are central to the assessment:

Cottle’s manoeuvre is a simple bedside test. The examiner gently pulls the patient’s cheek laterally on one side, which mechanically opens the internal nasal valve area. The patient is asked to breathe through the nose. If breathing improves significantly with this manoeuvre, internal nasal valve collapse is likely. The test is not perfect (it can produce false positives in some patients and false negatives in others), but it is a useful clinical pointer that takes seconds to perform.

NOSE Scale (the Nasal Obstruction Symptom Evaluation scale) is a validated questionnaire that scores five obstruction-related symptoms on a 0-to-4 scale, producing a total out of 100. It is also used to support Medicare eligibility documentation for functional rhinoplasty under MBS item 45641.

The clinical examination also assesses the external nasal shape, the position of the alar cartilages, the internal valve angle (between the upper lateral cartilages and the septum), the septum, and the turbinates. Endoscopy may be used where deeper structures need examining.

Why septoplasty alone may not fix valve collapse

This is one of the most important clinical distinctions in nose surgery. Septoplasty addresses the nasal septum, the central wall between the two nasal passages. It is a useful and effective procedure where the septum is the cause of obstruction. But it does not provide structural support to the nasal sidewall or the nostril rim, which is where valve collapse occurs.

A patient with both a deviated septum and nasal valve collapse who has septoplasty alone may notice partial improvement, but the breathing problem continues if the valve weakness is not also addressed. This is a common clinical pattern: patients who report partial improvement after septal surgery often have unaddressed valve collapse requiring structural grafting through functional rhinoplasty.

Identifying both problems before the first surgery avoids this outcome. Where both are present, the correct procedure is septorhinoplasty (combined septoplasty and functional rhinoplasty) in the same operation.

How is nasal valve collapse treated?

The structural treatment for nasal valve collapse is functional rhinoplasty using cartilage grafts that restore the support that has been lost or that was never adequate. Several specific graft techniques apply to different parts of the valve:

Spreader grafts are paired strips of cartilage placed between the upper lateral cartilages and the septum at the internal nasal valve. They mechanically widen the internal valve angle, improving airflow through the narrowest part of the airway. Spreader grafts are the standard treatment for internal nasal valve collapse, and are also used in many primary rhinoplasty operations to preserve the internal valve during dorsal reduction.

Alar batten grafts are flat strips of cartilage placed against the lateral nasal wall to support the area between the alar cartilage and the bony pyramid, preventing sidewall collapse during inhalation. They are used for external nasal valve collapse and some cases of internal valve weakness.

Lateral crural strut grafts are placed alongside the lateral crus of the alar cartilage to reinforce the nostril rim. They are useful for severe external valve weakness, particularly where alar cartilages are weak or disrupted by previous surgery.

Other supportive grafts (columellar struts, tip grafts, extended spreader grafts) may be added depending on anatomy.

Cartilage for grafting is typically harvested from the patient’s own septum, ear (conchal cartilage), or rib (costal cartilage). Autologous grafts are preferred over synthetic implants for long-term safety. For the full surgical context, see our functional rhinoplasty page.

Recovery and outcomes

Recovery from functional rhinoplasty for nasal valve collapse follows a similar timeline to cosmetic rhinoplasty. The external splint is removed at approximately 7 days, most patients return to office-based work in week 2, and contact sport is avoided for 6 weeks. Internal swelling continues to settle over 3 to 6 months, with the final breathing result typically clear by 6 to 12 months as the airway settles around the new structural framework.

Breathing improvement is typically noticeable within the first few weeks, with the full benefit appreciated over the longer recovery window. Outcomes vary between patients depending on the severity of the original collapse, the grafting used, and individual healing.

Cost and Medicare

Functional rhinoplasty for nasal valve collapse may be eligible for Medicare under MBS item 45641 (total rhinoplasty), where airway obstruction is documented and NOSE Scale criteria are met. Where Medicare applies, private health insurance with appropriate cover may also contribute to hospital costs, substantially reducing out-of-pocket cost compared with cosmetic-only rhinoplasty.

The total fee structure, Medicare framework, and what documentation is needed for Medicare eligibility are covered in detail on the functional rhinoplasty page. For a broader cost comparison across nose surgery procedures, see our rhinoplasty cost guide. Initial consultation fee is $450.

When to seek assessment for nasal valve collapse

Consider a clinical assessment if you have ongoing nasal obstruction that has not responded to medical management, if breathing problems started or worsened after a previous rhinoplasty, if you experience nasal blockage during exercise without allergic symptoms, or if you have had septal surgery without your breathing improving as expected. The assessment can identify whether nasal valve collapse is contributing and whether functional rhinoplasty is the appropriate next step.

Frequently asked questions

What does the Cottle’s manoeuvre tell you?

Cottle’s manoeuvre is a simple bedside test where the examiner gently pulls the patient’s cheek laterally to open the internal nasal valve area. If breathing through the nose improves significantly with this manoeuvre, internal nasal valve collapse is likely contributing to the obstruction. The test is a useful clinical pointer but does not replace a full examination. A positive Cottle’s manoeuvre supports the case for spreader grafts during functional rhinoplasty.

Can nasal valve collapse develop after rhinoplasty?

Yes, and this is one of the most common causes of valve collapse seen in clinical practice. Where cartilage has been removed during a previous rhinoplasty without replacing the structural support, the upper lateral cartilages or alar cartilages can lose stability and collapse inward during breathing. This may happen months or years after the original surgery. Where valve collapse follows previous rhinoplasty, revision rhinoplasty rather than primary functional rhinoplasty may be the appropriate procedure.

What is the difference between nasal valve collapse and a deviated septum?

A deviated septum involves the central wall separating the nasal passages, where the septum is bent or displaced, narrowing one or both nasal passages. Nasal valve collapse involves the structural support of the sidewall (internal valve) or nostril rim (external valve), where weakness causes the airway to narrow during inhalation. The two problems can coexist, and they are addressed by different procedures: septoplasty for the septum, functional rhinoplasty with cartilage grafts for valve collapse. Where both are present, septorhinoplasty addresses both in the same operation.

Is nasal valve collapse always treated with surgery?

No. Mild cases of external nasal valve collapse may be managed non-surgically with external or internal nasal dilators, which can provide useful temporary improvement (particularly for sleep or exercise). However, dilators do not address the underlying structural weakness, and for more significant valve collapse the structural solution (cartilage grafting) is typically required for lasting improvement. The choice depends on symptom severity, lifestyle impact, and patient preference.

How long do spreader grafts and alar batten grafts last?

Cartilage grafts harvested from the patient’s own tissue (septum, ear, or rib) integrate with the surrounding structures during healing and become a permanent part of the supporting framework. They do not need to be replaced and typically maintain structural function long-term. Some minor resorption or settling can occur over years, and a few patients require revision, but the general expectation is durable structural support from a single appropriately planned operation.

Schedule a clinical assessment with Dr Turner

If you have ongoing nasal obstruction that may be caused by nasal valve collapse, a clinical assessment can identify which valves are involved and whether functional rhinoplasty is appropriate. Dr Scott Turner is a Specialist Plastic Surgeon (FRACS) who consults with patients in Sydney about functional rhinoplasty, septoplasty, septorhinoplasty, and revision rhinoplasty at Bondi Junction and Manly. The consultation includes Cottle’s manoeuvre testing, NOSE Scale scoring where relevant, full nasal examination, and discussion of the treatment pathway for your anatomy.

To schedule a clinical assessment, contact our team.

Phone: 1300 437 758 Email: [email protected] Bondi Junction: 39 Grosvenor Street, Bondi Junction NSW Manly: Suite 504, Level 5, 39 East Esplanade, Manly NSW

Two consultations are required before any cosmetic component of surgery is scheduled, in line with Medical Board and AHPRA requirements.