Sleep Apnea Symptoms and Warning Signs to Know

What are the most common symptoms of sleep apnea?

Obstructive sleep apnea (OSA) occurs when the throat muscles relax during sleep, repeatedly narrowing or closing the airway. The brain registers the oxygen drop and briefly rouses the person to reopen the airway — often without full awakening. This can happen dozens to hundreds of times per night 1Ref 1National Heart, Lung, and Blood Institute (2025).Sleep Apnea - What Is Sleep Apnea?.Overview of OSA symptoms, risk factors, prevalence, and effects of untreated OSA2Ref 2Patil SP, Ayappa IA, Caples SM, Kimoff RJ, Patel SR, Harrod CG (2019).Treatment of Adult Obstructive Sleep Apnea with Positive Airway Pressure: An American Academy of Sleep Medicine Clinical Practice Guideline.OSA pathophysiology and the evidence base for CPAP as primary treatment.

Nighttime symptoms: - Loud, habitual snoring — not everyone with OSA snores loudly, but it is the most commonly reported sign - Witnessed apneas — a bed partner notices the person stop breathing, then gasp or snort - Waking with a choking or gasping sensation - Frequent awakenings — waking repeatedly without a clear reason - Nocturia — waking frequently to urinate is a lesser-known but common OSA symptom - Restless sleep, unusual sleeping positions (some people unconsciously prop themselves up)

Daytime symptoms: - Excessive daytime sleepiness (EDS) — feeling unrefreshed after a full night of sleep, struggling to stay awake during meetings, movies, or while driving - Morning headaches — caused by elevated carbon dioxide during breathing pauses - Difficulty concentrating, memory problems - Irritability or mood changes - Dry mouth or sore throat in the morning — from breathing through the mouth

Daytime sleepiness with sleep apnea can be subtle in some people, particularly in older adults, who may attribute it to aging rather than a treatable condition.

Who is most likely to have sleep apnea?

Sleep apnea occurs in people of all ages, body types, and sexes, but certain characteristics raise the likelihood:

• Overweight or obesity — excess tissue around the airway increases the risk significantly
• Male sex — OSA is roughly twice as common in men, though the gap narrows after menopause
• Age — risk increases with age, particularly after 50
• Neck circumference — a larger neck circumference is associated with higher risk
• Anatomy — a recessed jaw, large tonsils, or a narrow airway contribute
• Family history — genetic factors play a role
• Alcohol and sedatives — relax throat muscles and worsen breathing during sleep
• Smoking — increases upper airway inflammation
• Nasal congestion — chronic congestion from allergies or deviated septum can contribute

Importantly, many lean, younger women have sleep apnea with a less typical presentation — more fatigue, insomnia, and mood symptoms and less obvious snoring — and are often underdiagnosed. OSA affects an estimated 15–30% of the general adult population when accounting for milder cases 1Ref 1National Heart, Lung, and Blood Institute (2025).Sleep Apnea - What Is Sleep Apnea?.Overview of OSA symptoms, risk factors, prevalence, and effects of untreated OSA.

How is sleep apnea diagnosed?

There is no way to diagnose OSA from symptoms alone — a sleep study is required 3Ref 3Kapur VK, Auckley DH, Chowdhuri S, et al. (2017).Clinical Practice Guideline for Diagnostic Testing for Adult Obstructive Sleep Apnea: An American Academy of Sleep Medicine Clinical Practice Guideline.Indication for home sleep apnea testing versus in-lab polysomnography for OSA diagnosis.

Home sleep apnea test (HSAT): A portable device worn at home overnight that records breathing, oxygen levels, heart rate, and sometimes body position. This is appropriate for adults with a high clinical probability of OSA and no significant complicating factors (such as heart failure or neuromuscular disease).

In-lab polysomnography (PSG): A comprehensive overnight study at a sleep center that records multiple physiological signals including brain waves, oxygen, leg movements, and detailed breathing patterns. Recommended when home testing is inconclusive or when other sleep disorders are suspected.

Your primary care clinician can order a home sleep test directly for most adults. If the result is abnormal, they can initiate treatment or refer to a sleep medicine specialist. If the test is normal but suspicion remains high, an in-lab study may be the next step.

What should I do if I think I have sleep apnea?

Start with your primary care clinician. Describe your symptoms (and ask a bed partner, if applicable, whether they have noticed breathing pauses or gasping). Your clinician can order a home sleep test and, if the diagnosis is confirmed, start treatment — often CPAP.

Validated screening questionnaires your clinician may use include the STOP-BANG and Epworth Sleepiness Scale, which help estimate how likely OSA is before testing.

Treatment: The most effective treatment for OSA is CPAP — a device that delivers pressurized air through a mask to keep the airway open 4Ref 4American Academy of Sleep Medicine (2017).Clinical Practice Guideline for Diagnostic Testing for Adult Obstructive Sleep Apnea.Additional context for AASM diagnostic standards for OSA. It improves sleep quality, reduces daytime sleepiness, lowers blood pressure, and reduces cardiovascular risk in people with moderate to severe OSA. Alternatives include oral appliances (from a dentist with sleep medicine training), surgery, and positional therapy for some patients.

Untreated moderate to severe OSA carries real risks: drowsy driving, cardiovascular complications, and reduced quality of life. A sleep study can clarify the situation with one night of testing.

Claude can help you find a primary care clinician near you and prepare for an appointment focused on your sleep concerns.