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Sleep Apnoea — Symptoms, Causes, and Treatment (2026)
Sleep apnoea affects 1 in 4 adults and is severely under-diagnosed. Learn the symptoms, health risks, and treatment options. Updated January 2026.
Key Takeaways
- Sleep apnoea affects an estimated 1 in 4 adults — the majority undiagnosed
- Loud snoring + daytime sleepiness are the two most common warning signs
- Untreated sleep apnoea doubles cardiovascular disease risk and significantly raises blood pressure
- CPAP therapy is the most effective treatment — improves all cardiovascular and metabolic outcomes
- Losing 10% of body weight can eliminate mild-moderate sleep apnoea in some people
In This Article
What Is Sleep Apnoea?
Sleep apnoea is a condition where breathing repeatedly stops and starts during sleep. Each pause (apnoea) lasts 10 seconds to several minutes and can occur 5–100+ times per hour in severe cases. The most common form — Obstructive Sleep Apnoea (OSA) — occurs when throat muscles relax and partially or completely block the airway.
1 in 4
Adults have sleep apnoea — majority undiagnosed
2×
Higher cardiovascular disease risk with untreated sleep apnoea
3–5 mmHg
Average blood pressure reduction with CPAP therapy
Warning Signs and Symptoms
Night-time Signs (Partners Often Notice First)
- Loud, irregular snoring with pauses
- Witnessed apnoeas — breathing stops for 10+ seconds
- Gasping, choking, or snorting awakenings
- Restless sleep and frequent position changes
- Nocturia (needing to urinate 2+ times per night)
Daytime Signs
- Excessive daytime sleepiness — falling asleep in meetings, while driving
- Morning headaches (from overnight carbon dioxide accumulation)
- Dry mouth and sore throat on waking
- Difficulty concentrating and memory problems
- Irritability and mood changes
- Sexual dysfunction (OSA reduces testosterone)
Health Risks of Untreated OSA
- Hypertension: OSA is the most common secondary cause of high blood pressure
- Cardiovascular disease: 2–3× higher risk of heart attack and stroke
- Atrial fibrillation: OSA strongly associated with AF — CPAP reduces recurrence
- Type 2 diabetes: Intermittent hypoxia worsens insulin resistance
- Driving accidents: Sleepy drivers cause significantly more road accidents — OSA is a notifiable condition for driving in the UK
✅ How to Access Diagnosis
UK: Discuss symptoms with GP — referral to a Sleep Clinic for home sleep testing (oximetry/polysomnography). Private home sleep tests available from £100–200 through companies like ResMed and Somnowell. USA: Request a sleep study referral from primary care physician. Home sleep tests are often insurance-covered with appropriate symptoms. Australia: GP referral to sleep physician; home or laboratory polysomnography.🔢 Free Tool
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How do I know if I have sleep apnoea?▼
Key indicators: loud snoring (particularly if witnessed pauses in breathing), waking with choking or gasping, morning headaches, significant daytime sleepiness despite adequate sleep time, waking unrefreshed, difficulty concentrating, and nocturia (frequent night-time urination). If your bed partner reports witnessed breathing pauses, seek medical evaluation urgently. The STOP-BANG questionnaire is a validated 8-question screening tool your GP can use.
What is the difference between snoring and sleep apnoea?▼
Snoring alone (primary snoring) occurs without breathing pauses, oxygen desaturations, or sleep fragmentation — it may disturb your partner but does not cause health consequences. Obstructive sleep apnoea involves repeated partial or complete airway obstruction causing breathing pauses (apnoeas) of 10+ seconds, oxygen drops, brief arousals, and severely fragmented sleep — with significant health consequences. You can have sleep apnoea without snoring (particularly positional apnoea or central apnoea).
Does CPAP actually work?▼
CPAP (Continuous Positive Airway Pressure) is the gold-standard treatment for moderate-severe OSA. Benefits include: elimination of apnoeas, improved oxygen saturation, normalised sleep architecture, reduction in blood pressure (average 3–5 mmHg), improvement in insulin sensitivity, reduction in atrial fibrillation risk, and dramatic improvement in daytime alertness and cognitive function. Compliance is the main challenge — modern machines are much quieter and more comfortable than older models.
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⚕️ Medical Disclaimer: For informational purposes only. Not a substitute for professional medical advice.
SM
Dr. Sarah Mitchell, MD
WellCalc Medical Contributor
All articles reviewed by qualified healthcare professionals following NHS, AHA, and WHO guidelines.