How to Find Out If You Have Sleep Apnea (2026)

I spent a stretch of my thirties waking up more tired than when I went to bed, blaming it on stress, then on my mattress, then on just being "not a morning person." It wasn't until my partner mentioned that I'd stopped breathing for a few seconds a couple of times a night that I connected the dots. That's a pretty common way into this - someone else notices before you do. If you're here because you're wondering whether what's happening at night has a name, here's how people actually find out.

What are the signs that I might have sleep apnea?

Sleep apnea symptoms split into what happens overnight and what you feel the next day. Neither one alone is proof of anything, but a cluster of them is worth paying attention to.

• Loud, frequent snoring - not the occasional snore, but snoring most nights, often loud enough to be heard through a wall.
• Witnessed breathing pauses, gasping, or choking - this is usually reported by a partner, since you're asleep when it happens. It's one of the more specific signs.
• Waking up a lot during the night, sometimes without remembering why.
• Morning headaches that ease off within a couple of hours of waking.
• Waking up feeling unrefreshed, even after what should be a full night.
• Needing to urinate multiple times overnight, more than seems explained by fluid intake.
• Daytime sleepiness that shows up as dozing off in meetings, while reading, or at red lights.
• Trouble concentrating or mood changes - irritability, low mood, or just feeling foggy.

The NHS lists the core symptoms plainly: sleep apnoea can involve "your breathing stopping and starting," "making gasping, snorting or choking noises," and "loud snoring" during the night, alongside daytime effects like feeling "very tired," finding it "hard to concentrate," having "mood swings," and getting "a headache when you wake up."

What raises the risk of sleep apnea?

Some factors don't cause sleep apnea directly, but they make the airway more likely to narrow or collapse during sleep. According to the NHS, sleep apnoea is linked to "obesity," "having a large neck," "getting older," "having other family members with sleep apnoea," "drinking alcohol," "smoking," "having large tonsils or adenoids," and "sleeping on your back."

• Weight and neck size. Extra tissue around the neck and throat is one of the most consistent risk factors.
• Age. Risk increases as you get older, though the NHS notes "children and young adults can also get it."
• Sex. Sleep apnea is more commonly diagnosed in men, though it's under-recognized in women, who may present with different symptoms like fatigue or insomnia rather than obvious snoring.
• Family history. Having relatives with sleep apnea raises your own odds.
• Alcohol and smoking. Both relax or irritate the airway in ways that make apnea events more likely.
• Anatomy. Large tonsils, a naturally narrow airway, or sleeping on your back can all play a role - see our note on the best sleeping position for sleep apnea if this is a factor for you.

None of these guarantee you have sleep apnea, and plenty of people with several risk factors don't have it. They're context, not a verdict.

Can I screen myself before seeing a doctor?

Yes, and it's a reasonable first step - as long as you treat the result as a reason to book an appointment, not as an answer in itself. Two tools come up most often.

• STOP-BANG questionnaire. This is an eight-item checklist covering Snoring, Tiredness, Observed apnea, blood Pressure, BMI, Age, Neck circumference, and Gender. The Sleep Foundation describes it as intended "to give physicians an easy-to-use tool to identify people who might have obstructive sleep apnea," and is clear that "a higher STOP-Bang score is associated with a greater likelihood of sleep apnea, but the questionnaire cannot diagnose the condition on its own."
• Epworth Sleepiness Scale (ESS). This one focuses on daytime sleepiness rather than nighttime symptoms - it asks how likely you'd be to doze off in eight everyday situations (watching TV, sitting in traffic, and so on). The Sleep Foundation notes "the ESS alone is insufficient to diagnose excessive daytime sleepiness" and that a physician needs to interpret it alongside your medical history.

Both are free, take a few minutes, and are worth doing honestly before an appointment - a high score gives your doctor a useful starting point. Neither one replaces a sleep study, and a low score doesn't fully rule sleep apnea out either, especially if a partner has witnessed breathing pauses.

What about my smartwatch or sleep tracking app?

Wearables and phone apps have gotten better at estimating things like blood oxygen dips and restlessness, and some can flag a pattern worth investigating. But none of them are a substitute for a real diagnosis - they don't record the airflow, effort, and brain-wave data that a sleep study does, and consumer devices aren't held to medical accuracy standards. Treat a wearable the same way as the questionnaires above: a hint worth following up, not an answer.

How do doctors actually diagnose sleep apnea?

This is the part self-screening can't do for you. The path typically looks like this:

• Talk to a doctor first. Describe your symptoms, and if you have a partner who's witnessed breathing pauses or snoring, their account is genuinely useful information - bring it with you.
• Get a referral if needed. The NHS explains that "if a GP thinks you might have sleep apnoea, they may refer you to a specialist sleep clinic for tests."
• A sleep study measures what's actually happening. This is either a home sleep apnea test (HSAT) or in-lab polysomnography. The NHS describes it simply: "at the clinic, you may be given devices that check things like your breathing and heartbeat while you sleep," and "you can usually do this at home, but sometimes you may need to stay in the clinic overnight."
• Results are scored as AHI (apnea-hypopnea index) - the number of breathing pauses per hour. The NHS breaks it down as "AHI of 5 to 14 = mild," "AHI of 15 to 30 = moderate," and "AHI over 30 = severe."

The American Academy of Sleep Medicine is direct about which test is the reference standard, stating that "polysomnography is the standard diagnostic test for the diagnosis of OSA in adult patients in whom there is a concern for OSA based on a comprehensive sleep evaluation." A home sleep apnea test is often used as a more convenient alternative for straightforward cases, but it can miss things polysomnography catches, and it isn't right for everyone - people with other health conditions are usually better served by the in-lab version. Either way, it's a doctor who orders the test and interprets the result, not an app or a questionnaire.

Why does it matter if I get this checked instead of just living with it?

It's tempting to treat loud snoring and tiredness as background noise, especially if you've had it for years. But the NHS is clear that untreated sleep apnoea is linked to real downstream risks, including "high blood pressure," "a higher chance of having a stroke," "type 2 diabetes," "heart disease," and "a higher chance of having a serious accident caused by tiredness, such as a car accident." That's not meant to alarm you - it's meant to explain why "just tired" is worth ruling out rather than pushing through indefinitely. If this sounds familiar, our broader guide to sleep apnea covers what the condition involves once diagnosed, and what treatment can look like beyond CPAP.

Frequently asked questions

Related reading:

• How Do You Treat Sleep Apnea Without CPAP?
• Is Sleep Apnea Overdiagnosed?
• Sleep Apnea Demystified: A Comprehensive Guide
• Best Sleeping Position for Sleep Apnea
• Sleep Toolkit - the gear we actually recommend for better sleep

Sources & review: Checked against the NHS page on sleep apnoea, the American Academy of Sleep Medicine's position statement on home sleep apnea testing, and Sleep Foundation guides on the STOP-Bang score and the Epworth Sleepiness Scale. This is general information, not medical advice or a diagnosis, and doesn't replace an evaluation from a doctor - if you recognize these symptoms in yourself, please talk to one.