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Health condition · Clinically reviewed

Deviated septum, medical therapy first, endoscopic septoplasty when it counts.

Many deviations are silent. The ones that matter cause blockage, sinusitis and disturbed sleep, and they respond to a stepped plan built on nasal endoscopy.

Jump to treatment
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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against ENT UK, NICE and peer-reviewed rhinology sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice including endoscopic septoplasty, coblation turbinate reduction and combined airway assessment.

Key facts

Deviated septum at a glance.

The essentials, in plain English. What it is, how common it is and how UK ENT surgeons approach it in 2026.

  • What it is

    Displacement of the nasal septum from the midline, disturbing one or both sides of the nasal airway.

  • How common

    Very common. Up to 80 per cent of adults have some degree of deviation on careful examination.

  • Cause

    Congenital (birth trauma or developmental) or acquired after nasal injury, fracture or previous surgery. Tumour is a rare cause.

  • Anatomy

    Quadrilateral cartilage anteriorly, perpendicular plate of the ethmoid, vomer and maxillary crest posteriorly.

  • Types of deviation

    C-shaped, S-shaped, spur, caudal, posterior and septal ridge patterns, each with different symptom profiles.

  • First-line treatment

    Conservative medical therapy first. Septoplasty is reserved for symptomatic patients who fail medical management.

Why this guide matters

Not every crooked septum needs a knife.

A deviated septum is one of the most over-diagnosed reasons for a blocked nose. These three principles shape the rest of this page.

  • Endoscopy is essential

    A deviation seen from the front tells only part of the story. Rigid or flexible endoscopy is needed before any surgical decision.

  • Medical therapy first

    Intranasal steroids, saline rinses and treating coexisting allergy help many people avoid an operation.

  • Septoplasty is targeted

    When symptoms match the anatomy and medical therapy has failed, endoscopic septoplasty (often with turbinate reduction) gives durable benefit.

How the diagnosis is made

From blocked nose to a clear plan.

The steps a UK GP or ENT surgeon will normally follow, in order, so you know what to expect and why each one matters.

  1. 01

    Assessing

    Focused history

    Trauma, duration, laterality, positional obstruction, sleep quality, snoring, mouth breathing and any coexisting allergic rhinitis.

  2. 02

    Assessing

    External nose and rhinoscopy

    Inspection of the external nasal pyramid and anterior rhinoscopy with a Thudichum speculum to view the septum and turbinates.

  3. 03

    Assessing

    Cottle manoeuvre

    Gently lateralising the cheek differentiates true septal obstruction from nasal valve collapse, which needs a different operation.

  4. 04

    Confirming

    Nasal endoscopy

    Rigid or flexible endoscopy in clinic is critical. See our guide to the nasal endoscopy clinic for what to expect.

  5. 05

    Confirming

    CT of the sinuses

    Coronal and axial CT is used selectively for surgical planning or when recurrent sinusitis is suspected.

  6. 06

    Confirming

    Airflow and allergy testing

    SNIP, acoustic rhinometry and skin-prick or specific IgE testing are used in selected cases, especially where allergic rhinitis coexists.

  7. 07

    Preparing

    Sleep study when indicated

    Snoring, witnessed apnoeas or daytime sleepiness warrant a sleep study to assess for obstructive sleep apnoea.

Typical timeline: first ENT visit to a settled surgical or medical plan in a few weeks.

Symptoms

What a deviated septum actually feels like.

The classic mixture of blockage, sinusitis, snoring and disturbed sleep, plus the subtler features people often miss.

  • Nasal obstruction

    Unilateral or bilateral blockage, often worse when lying on the affected side. The commonest reason people seek help.

  • Recurrent sinusitis and facial pain

    Impaired drainage predisposes to repeated sinus infections and pressure-type facial pain over the cheeks and forehead.

  • Snoring and sleep apnoea

    A narrow airway contributes to snoring and obstructive sleep apnoea. See our guide to sleep apnoea for the full picture.

  • Mouth breathing and dry mouth

    Chronic mouth breathing causes a dry mouth, sore throat on waking and, in children, dental and orthodontic problems.

  • Nosebleeds

    A deviated septum with mucosal drying can trigger recurrent epistaxis. See our guide to child nosebleeds for children.

  • Rhinogenic headaches

    Septal spurs contacting the turbinate can produce contact-point headaches, though the link remains debated.

  • Reduced sense of smell

    Obstruction can impair airflow to the olfactory cleft and cause hyposmia, which sometimes recovers after treatment.

  • Post-nasal drip, cough and noisy breathing

    Turbulent airflow produces audible breathing and post-nasal drip. Many mild deviations are asymptomatic incidental findings.

Treatment

How a deviated septum is treated in the UK.

Medical therapy and simple aids first. Endoscopic septoplasty and turbinate reduction next, with septorhinoplasty and airway surgery reserved for selected patients.

  • Intranasal corticosteroids

    Daily fluticasone, mometasone, budesonide or a fluticasone and azelastine combination (Dymista) reduces mucosal swelling and often improves symptoms alone.

  • Saline nasal rinse

    High-volume saline irrigation with a Neti pot or a Sinus Rinse bottle clears crusts, improves ciliary function and helps recurrent sinusitis.

  • Nasal dilators

    External strips (Breathe Right) and internal dilators (Mute, Airmax) can improve nocturnal airflow for mild deviation, valve collapse or snoring.

  • Antihistamines and montelukast

    Where allergic rhinitis coexists, oral antihistamines or a leukotriene antagonist (montelukast) can settle the mucosal component.

  • Septoplasty

    The definitive operation for a symptomatic significant deviation confirmed on endoscopy. Usually a day case and increasingly endoscopic.

  • Turbinate reduction

    Submucous resection, coblation or radiofrequency turbinoplasty is often combined with septoplasty when inferior turbinate hypertrophy contributes.

  • Septorhinoplasty

    A more complex specialist operation for combined functional and cosmetic deformity, including nasal valve reconstruction with spreader or batten grafts.

  • Airway surgery for sleep apnoea

    When obstruction is multi-level, options include adenotonsillectomy, palate, tongue-base or hypoglossal nerve stimulation surgery in selected patients.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or ENT surgeon knows your history and endoscopy findings and can tell you which parts apply to you. If in doubt, get seen.

  • ENT UK. Position paper on septoplasty and septorhinoplasty.

  • NICE Clinical Knowledge Summaries. Nasal obstruction and rhinosinusitis.

  • European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS 2020).

  • British Rhinological Society. Standards for septal surgery and audit.

Red flags

When a blocked nose needs urgent attention.

Most deviations are benign. These are the situations that are not, and where a specialist opinion is needed quickly.

  • Unilateral obstruction with bleeding

    Progressive one-sided blockage with bloody discharge in an adult can suggest a nasal or sinus tumour and needs urgent ENT review.

  • Septal haematoma after trauma

    A bulging, boggy septum after a nose injury is an emergency. Untreated it destroys the cartilage and causes a saddle nose deformity.

  • Septal perforation

    A hole in the septum causes whistling, crusting and bleeding and needs specialist assessment for cause and closure options.

  • Saddle nose deformity

    Loss of dorsal support suggests significant cartilage damage from trauma, previous surgery, cocaine use or vasculitis.

  • Facial swelling or visual change

    Sinus infection with orbital swelling, double vision or severe headache needs same-day assessment for orbital or intracranial complications.

  • Persistent obstruction in a child

    In children, adenoid hypertrophy, choanal atresia and allergic disease are more likely than a deviated septum. See our guides to child adenoids and child snoring.

  • Cocaine or vasculitis features

    Rapid septal destruction with systemic features (rashes, joint pain, kidney or lung disease) needs urgent rheumatology and ENT review.

  • Suspected obstructive sleep apnoea

    Loud snoring with witnessed apnoeas, choking arousals or excessive daytime sleepiness needs a sleep study before considering airway surgery.

  • Failed septoplasty

    Persistent obstruction after surgery warrants re-endoscopy to look for residual deviation, valve collapse or turbinate hypertrophy.

Living with it

A treatable problem, with a clear ladder.

Four small things that make the biggest daily difference: rinse, sleep position, treat the allergic layer and give medical therapy the time it needs.

A quiet reminder

Consistency beats intensity, every time.

Small, steady habits kept up for months do more than a heroic week that doesn't last.

  1. 01 Rinse

    Saline is your friend

    A daily high-volume saline rinse settles mucosal swelling, clears crusts and often reduces the sense of blockage on its own.

  2. 02 Position

    Sleep on the less affected side

    Many people breathe better when the more open nostril is uppermost. A slightly elevated head can also help.

  3. 03 Allergy

    Treat the allergic layer

    Where hay fever or house-dust-mite allergy coexists, treating that layer often improves the septal symptoms too.

  4. 04 Timing

    Give medical therapy 8 to 12 weeks

    Intranasal steroids need consistent daily use to work. Judge success at three months, not three days, before considering surgery.

Frequently asked

Everything we get asked about a deviated septum.

Quick answers on endoscopy, medical therapy, septoplasty and airway surgery.

  • What is a deviated septum?

    The nasal septum is the wall of cartilage and bone that divides the two sides of the nose. A deviated septum is one that sits off the midline, narrowing one or both nasal airways.

  • Is a deviated septum serious?

    Most deviations are minor and cause no symptoms. Significant deviation can cause nasal obstruction, recurrent sinusitis, snoring, sleep apnoea and impaired smell, and these are the situations that benefit from treatment.

  • Do I need surgery for a deviated septum?

    Not always. Conservative measures such as intranasal steroids, saline rinses and treating any coexisting allergy help many people. Septoplasty is reserved for symptomatic significant deviation confirmed on endoscopy that has not responded to medical therapy.

  • What does septoplasty involve?

    Septoplasty is usually a day-case operation done through the nostrils, increasingly with an endoscope. Deviated cartilage and bone are straightened or removed and the mucosal lining is preserved. It is often combined with a turbinate reduction if the turbinates are enlarged.

  • What are the risks of septoplasty?

    Common issues include short-term crusting, bleeding and numbness of the front teeth. Less common risks include persistent obstruction, septal perforation, septal haematoma and a change in nasal shape (saddle nose). Your surgeon will discuss these in detail during consent.

  • Can a deviated septum cause sleep apnoea?

    It can contribute, but obstructive sleep apnoea is usually multi-level and involves the palate, tongue base and jaw as well as the nose. A sleep study is important before any airway surgery, and treatment is often combined rather than nasal-only.

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