Snoring and Sleep Apnoea: Causes, Diagnosis and Treatment

In this guide15 sections

1. Snoring or Sleep Apnoea? The Difference That Matters
2. What Is Obstructive Sleep Apnoea?
3. Where the Airway Narrows
4. Sleep Apnoea Symptoms
5. Is Sleep Apnoea Dangerous?
6. Sleep Apnoea and Driving: the DVLA Position
7. How Sleep Apnoea Is Diagnosed
8. The Assessment Pathway
9. Treatment for Sleep Apnoea
10. Where the Nose Genuinely Fits In
11. Palate and Throat Procedures
12. Cost and What to Expect
13. Snoring and Sleep Apnoea FAQs
14. ENT-Led Assessment at Centre for Surgery
15. Related Reading

Snoring is common. Sleep apnoea is not the same thing, and the difference matters more than almost anything else on this page. Simple snoring is noise — the airway narrows and soft tissue vibrates, but you keep breathing. In obstructive sleep apnoea (OSA, also spelled sleep apnea), the airway closes completely for ten seconds or more at a time, oxygen levels fall, and the brain briefly rouses you to reopen it. This can happen hundreds of times a night without you remembering any of it.

The two conditions look identical from the outside and are treated entirely differently. That is why the first step is never surgery — it is finding out which one you have.

This guide explains how to tell them apart, what a sleep study measures, the legal position on sleep apnoea and driving, and where treatment genuinely helps — including honest limits on what nasal surgery can achieve. Where obstruction sits in the nose, procedures such as septoplasty, turbinate reduction and correction of a deviated septum have a real role. Where snoring is coming from the palate rather than the nose, laser snoring treatment is the more relevant option. Neither is a substitute for diagnosing sleep apnoea first.

Snoring or Sleep Apnoea? The Difference That Matters

Simple (primary) snoring means the airway narrows enough to vibrate but air continues to move. Oxygen levels stay normal, sleep architecture is largely preserved, and the health consequences are limited — the main casualty is usually a partner’s sleep.

Obstructive sleep apnoea means the airway closes. Breathing stops, blood oxygen falls, and the body responds with a surge of adrenaline that lifts you into lighter sleep to reopen the throat. You will not remember these arousals, but they fragment sleep and place repeated strain on the cardiovascular system.

You cannot tell them apart by how loud the snoring is. Some people with severe OSA snore quietly; some thunderous snorers have no apnoea at all. The reliable signals of apnoea rather than snoring are witnessed pauses in breathing, gasping or choking arousals, and daytime sleepiness that persists despite adequate time in bed.

What Is Obstructive Sleep Apnoea?

During sleep the muscles that hold the upper airway open relax. In most people the airway stays patent. Where it is already narrow — through anatomy, weight, nasal obstruction or a combination — that relaxation is enough to let it collapse.

The three types

• Obstructive sleep apnoea (OSA) — by far the most common. The airway is physically blocked while the body continues trying to breathe. Chest and abdominal effort continue against a closed throat.
• Central sleep apnoea — neurological rather than mechanical. The brain briefly stops sending the signal to breathe, so there is no respiratory effort at all. Associated with heart failure, opioid medication and high altitude, and it does not respond to airway surgery.
• Complex (treatment-emergent) sleep apnoea — a combination, often only apparent once treatment for OSA has begun.

The distinction matters because only obstructive sleep apnoea has a structural component that surgery can address. Central sleep apnoea needs medical management.

Where the Airway Narrows

Obstruction happens at one or more of three levels:

• The nasal airway — septal deviation, enlarged turbinates, nasal valve collapse or chronic rhinitis. Nasal obstruction rarely causes OSA by itself, but it worsens it and it is the single commonest reason people cannot tolerate CPAP.
• The soft palate and uvula — the classic site of snoring vibration, and a frequent site of collapse.
• The tongue base — the tongue falls backwards in sleep, particularly when lying on the back. Often the dominant site in more severe disease, and the hardest to treat surgically.

Most people with OSA obstruct at more than one level. This is the central reason that operating on one site without knowing where the collapse actually occurs produces unpredictable results.

Sleep Apnoea Symptoms

At night, usually reported by a partner: loud snoring, breathing that stops and restarts, gasping or choking, restlessness, frequent waking, and needing to pass urine overnight.

During the day: waking unrefreshed, morning headache, dry mouth or sore throat on waking, difficulty concentrating, memory lapses, irritability and low mood, and sleepiness that intrudes on driving, meetings or watching television.

Many people do not recognise the daytime symptoms as abnormal, particularly where onset has been gradual over years. A large proportion of sleep apnoea is undiagnosed for exactly this reason.

Screening yourself: STOP-BANG

STOP-BANG is a validated screening questionnaire. Score one point for each — Snoring loudly, Tiredness in the daytime, Observed pauses in breathing, high blood Pressure, BMI over 35, Age over 50, Neck circumference over 40cm, male Gender.

Three or more suggests intermediate risk; five or more suggests high risk. It is a prompt to get tested, not a diagnosis — only a sleep study can confirm or exclude sleep apnoea.

Is Sleep Apnoea Dangerous?

Untreated moderate-to-severe obstructive sleep apnoea is associated with meaningfully increased risk of high blood pressure, atrial fibrillation and other arrhythmias, heart failure, stroke, type 2 diabetes and road traffic accidents. Repeated overnight oxygen desaturation and adrenaline surges place a nightly load on the cardiovascular system, and the effect on sleep apnoea heart rate patterns is measurable.

Questions about sleep apnoea life expectancy are common and the honest answer is that untreated severe OSA is associated with reduced life expectancy in observational studies, while treated OSA is not associated to anything like the same degree. That distinction is the reason diagnosis matters more than any single treatment choice.

Mild sleep apnoea in someone without symptoms is a different proposition and does not always require treatment. This is a decision to make with a clinician after testing, not before it.

Sleep Apnoea and Driving: the DVLA Position

This is a legal obligation, not advice, and it is frequently missed.

If you have excessive sleepiness that is likely to impair driving, you must stop driving and notify the DVLA. This applies whether or not you have a formal diagnosis. Under the DVLA medical guidelines for sleep apnoea, the rules differ by licence group:

• Group 1 (car and motorcycle) — you must notify the DVLA if you have confirmed OSA with excessive sleepiness. Driving may resume once symptoms are controlled with treatment and this is confirmed by your clinician.
• Group 2 (lorry and bus) — the requirements are stricter, notification thresholds are lower, and ongoing evidence of treatment adherence is required.

Notification is made using the DVLA sleep apnoea form (SL1 for Group 1, SL1V for vocational licences). Failing to declare a condition that affects driving is a criminal offence and can invalidate insurance.

Sleep apnoea may also count as a disability under the Equality Act 2010 where it has a substantial, long-term effect on normal day-to-day activities — relevant to workplace adjustments.

How Sleep Apnoea Is Diagnosed

Diagnosis requires a sleep study. Most begin with a home study, recording airflow, respiratory effort, oxygen saturation, heart rate and body position overnight. Where results are inconclusive or the picture is complex, an in-laboratory polysomnogram adds brain activity, eye movement and muscle activity.

The result is expressed as the Apnoea-Hypopnoea Index (AHI) — the number of breathing events per hour of sleep, where an apnoea is a complete blockage lasting at least ten seconds and a hypopnoea a partial one reducing airflow with associated desaturation or arousal.

• Under 5 — normal. Snoring at this level is simple snoring.
• 5 to 14 — mild OSA
• 15 to 29 — moderate OSA
• 30 or above — severe OSA

Oxygen desaturation and symptom burden are weighed alongside the AHI. Thresholds for children are lower.

Drug-induced sleep endoscopy

Where surgery is being considered, drug-induced sleep endoscopy (DISE) identifies where the airway actually collapses. Under light sedation that reproduces natural sleep, a flexible endoscope shows whether obstruction is at the palate, tongue base, nose or several levels at once.

This matters because airway surgery chosen without it is informed guesswork. DISE is what separates targeted treatment from an operation that may address the wrong level entirely.

The Assessment Pathway

Treatment for Sleep Apnoea

CPAP is first-line, and we will say so

For moderate-to-severe obstructive sleep apnoea, continuous positive airway pressure (CPAP) is the first-line treatment recommended by NICE. A sleep apnoea machine delivers pressurised air through a mask, splinting the airway open. Variants include CPAP at a fixed pressure, APAP which adjusts automatically, and BiPAP which uses different pressures for breathing in and out.

CPAP is highly effective when used consistently. Its weakness is not efficacy but tolerance — a substantial proportion of patients abandon it, and the commonest reasons are mask discomfort, dry mouth from mouth-leak, and being unable to breathe through the nose.

You will see clinics claim that surgery is more effective or more permanent than CPAP. For moderate-to-severe OSA that is not supported by the evidence, and we would rather tell you that than sell you an operation.

Mandibular advancement splints

A custom dental device holds the lower jaw forward, preventing the tongue falling back. Effective for simple snoring and mild-to-moderate OSA, and a reasonable option where CPAP cannot be tolerated. Requires adequate dentition and can cause jaw discomfort initially.

Positional therapy and lifestyle

Where events cluster while sleeping supine, positional devices help. Weight loss produces measurable AHI reduction where excess weight is a factor. Alcohol within four hours of bed and sedative medication both worsen airway collapse. Smoking increases airway inflammation. These are the honest answer to how to prevent sleep apnoea worsening, though they rarely resolve established moderate or severe disease alone.

Natural treatments for sleep apnoea — oropharyngeal exercises, didgeridoo playing, myofunctional therapy — have modest evidence for mild disease. They are not a substitute for treating moderate or severe OSA.

Where the Nose Genuinely Fits In

This is the part that needs stating plainly, because it is where most clinic content overreaches.

Nasal surgery alone rarely resolves obstructive sleep apnoea. Studies consistently show that correcting nasal obstruction produces only modest AHI reduction on its own, because the collapse in OSA is usually at the palate or tongue base, not the nose.

What nasal surgery does reliably do is make CPAP tolerable. Where someone cannot use their machine because their nose is blocked, relieving that obstruction converts a failed treatment into a working one — and lets pressures be lowered, which improves comfort further. That is a genuine, evidence-supported role, and for many patients it is the difference between treated and untreated disease.

It also frequently improves snoring, daytime nasal breathing and quality of life independently of the apnoea.

Relevant procedures include septoplasty for a deviated septum, turbinate reduction for enlarged turbinates, nasal valve repair for collapse on inspiration, and septorhinoplasty where the external framework also requires correction. More on how septoplasty and turbinate reduction improve nasal breathing.

A note on turbinectomy

Some sources still list turbinectomy — removal of the turbinates — as a sleep apnoea treatment. Total turbinate removal is outdated and carries the risk of empty nose syndrome, a distressing and largely irreversible complication in which the nose feels blocked despite a wide airway. Current practice reduces turbinate volume while preserving the lining. If turbinectomy is proposed to you, ask why.

Palate and Throat Procedures

Where DISE confirms palatal collapse or vibration is the dominant problem:

• Laser snoring treatment — a non-surgical course that tightens the soft palate. Suitable for simple snoring and mild palatal collapse, performed without incisions or general anaesthetic.
• Uvulopalatopharyngoplasty (UPPP) — surgical reshaping of the soft palate and uvula, sometimes with tonsillectomy. More effective than laser treatment for genuine OSA at palatal level, with a more significant recovery.
• Tonsillectomy — where large tonsils are the obstruction, particularly in younger adults and children. Sleep apnoea in infants and children is a distinct condition, usually adenotonsillar in origin, and is managed by paediatric ENT services.

Cost and What to Expect

Costs depend on which investigations and procedures are required, and are confirmed in writing after consultation. A sleep study, DISE assessment and any subsequent surgery are quoted separately so you can see what you are paying for at each stage.

Sleep apnoea investigation and treatment are available on the NHS, and CPAP is provided free where indicated. Waiting times for sleep studies vary considerably by area. Your GP is the route to NHS referral. Finance for private treatment is available through Chrysalis Finance, subject to status — see our finance options.

Snoring and Sleep Apnoea FAQs

ENT-Led Assessment at Centre for Surgery

Snoring and sleep apnoea assessment at Centre for Surgery is led by our ENT surgeon and rhinologist. That matters because the questions that determine treatment — is this snoring or apnoea, where is the airway collapsing, is the nose the limiting factor — are ENT questions, and answering them wrongly leads to the wrong operation.

Assessment includes clinical examination, nasal endoscopy, sleep study where indicated, and drug-induced sleep endoscopy where surgery is being considered. We will tell you plainly if CPAP is the right answer rather than surgery, and if your sleep study shows no apnoea 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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Phone: 020 7993 4849
Email: contact@centreforsurgery.com
Address: 95–97 Baker Street, Marylebone, London W1U 6RN
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Related Reading

• Laser snoring treatment
• Septoplasty (deviated septum surgery)
• Turbinate reduction surgery
• Nasal turbinates: why they swell and how they are treated
• What is a deviated septum?
• Septorhinoplasty
• How septoplasty and turbinate reduction can help you breathe better
• Pros and cons of turbinate reduction with septoplasty