Sleep-Disordered Breathing

Overview

Sleep-disordered breathing is an umbrella term for several conditions in which breathing is abnormal during sleep. It ranges from simple snoring at the milder end to obstructive sleep apnea, in which the airway repeatedly narrows or closes so that breathing pauses many times each night. Each pause briefly interrupts sleep and can lower the oxygen level in the blood.

During normal sleep, the muscles around the throat relax but keep the airway open. In sleep-disordered breathing, the airway becomes too narrow or unstable, causing vibration (snoring) or actual blockages. In children, enlarged tonsils and adenoids are a leading cause, while in adults excess weight, throat anatomy, and aging often play a role. Because it disrupts the restorative quality of sleep, the condition can cause daytime tiredness, poor concentration, and, over time, raise the risk of high blood pressure, heart problems, and other health issues. Effective treatments are available once the problem is identified.

Symptoms

Symptoms occur both during sleep and during the day. Many are first noticed by a bed partner or parent.

• Loud, habitual snoring
• Pauses in breathing, gasping, or choking during sleep
• Restless, broken sleep and frequent awakenings
• Daytime sleepiness, fatigue, or falling asleep easily
• Morning headaches and dry mouth or sore throat on waking
• Difficulty concentrating, irritability, or mood changes
• In children: mouth breathing, bedwetting, hyperactivity, or behavior and learning difficulties

Witnessed pauses in breathing followed by gasping are an important sign and should prompt medical evaluation, as untreated sleep apnea can affect the heart and overall health.

Causes

Sleep-disordered breathing develops when the upper airway becomes narrowed or collapses during sleep, or, less commonly, when the brain does not send steady signals to breathe.

• Airway crowding: Enlarged tonsils and adenoids (especially in children), a large tongue, or a small or set-back jaw.
• Excess weight: Fatty tissue around the neck and throat narrows the airway.
• Nasal blockage: Allergies, a deviated septum, or chronic congestion that forces mouth breathing.
• Muscle relaxation: Alcohol, sedatives, and aging make throat muscles more likely to collapse.
• Central problems: In central sleep apnea, the brain briefly fails to drive breathing, often linked to heart or neurological conditions.

Risk Factors

• Excess weight or obesity
• Enlarged tonsils and adenoids, especially in children
• Older age
• Male sex, though risk rises in women after menopause
• A large neck circumference or certain jaw and airway shapes
• Nasal congestion and allergies
• Alcohol use and sedative medications before bed
• A family history of sleep apnea

Diagnosis

Diagnosis starts with a discussion of sleep and daytime symptoms and an airway examination, followed by sleep testing.

• Sleep history and questionnaires: Reviewing snoring, witnessed pauses, sleepiness, and overall sleep quality.
• Physical examination: Checking the nose, throat, tonsils, jaw, and neck.
• Polysomnography (sleep study): An overnight test in a lab that records breathing, oxygen levels, brain waves, heart rhythm, and movement.
• Home sleep apnea testing: A simpler device used at home to detect breathing pauses and oxygen dips in suitable cases.

Treatment

Treatment depends on the cause and severity and ranges from lifestyle measures to devices and surgery. The goal is to keep the airway open and restore healthy sleep.

• Lifestyle changes: Weight loss when relevant, avoiding alcohol and sedatives before bed, sleeping on the side, and treating nasal congestion.
• Continuous positive airway pressure (CPAP): A machine that delivers gentle air pressure through a mask to hold the airway open; it is the main treatment for moderate to severe obstructive sleep apnea in adults.
• Oral appliances: Custom mouthpieces that move the lower jaw forward to keep the airway open, useful for snoring and milder apnea.
• Surgery: Removing enlarged tonsils and adenoids is often very effective in children; other procedures may address nasal blockage or throat anatomy in selected adults.
• Treating related conditions: Managing allergies, heart, or neurological problems that contribute.

Treating sleep-disordered breathing often improves energy, mood, concentration, and long-term heart health.

Prevention

• Maintain a healthy weight
• Limit alcohol and avoid sedatives close to bedtime
• Treat nasal allergies and congestion
• Sleep on your side rather than your back if that reduces snoring
• Have a child evaluated promptly if they snore loudly or have breathing pauses during sleep
• Avoid smoking, which irritates and narrows the airway

When to See a Doctor

See a doctor if you snore loudly and habitually, if a partner notices pauses in your breathing, or if you feel very sleepy during the day despite spending enough time in bed. For children, seek evaluation for loud snoring, breathing pauses, restless sleep, or daytime behavior and learning problems. Seek prompt care if breathing pauses are frequent or if there is severe daytime sleepiness that affects safety, such as while driving.

Related Topics

Frequently Asked Questions

References

1. American Academy of Sleep Medicine. Sleep-Disordered Breathing.
2. National Heart, Lung, and Blood Institute (NHLBI). Sleep Apnea.
3. Mayo Clinic. Sleep apnea — Symptoms and causes.
4. MedlinePlus, U.S. National Library of Medicine. Sleep apnea.