You likely need a CPAP machine if you have obstructive sleep apnea that’s causing your breathing to stop repeatedly during sleep. The only way to know for certain is through a sleep study, but several warning signs strongly suggest it’s time to get tested. If your bed partner has noticed you stop breathing at night, or you wake up exhausted no matter how long you sleep, those are two of the clearest signals that something is disrupting your airway while you’re unconscious.
Symptoms That Point Toward Sleep Apnea
Loud snoring is the most recognized symptom of obstructive sleep apnea, but not all snoring means you have it. The pattern that raises concern is snoring interrupted by periods of silence (when breathing actually stops), followed by a loud gasp or snort as breathing restarts. That cycle of snore, silence, gasp is what bed partners typically describe, and it’s a hallmark of airway obstruction.
Daytime symptoms are just as important, especially if you sleep alone and nobody is there to witness what happens at night. These include:
- Excessive daytime sleepiness that persists even after a full night in bed
- Morning headaches caused by fluctuating oxygen levels overnight
- Waking up multiple times at night to urinate
- Irritability, depression, or trouble with memory that doesn’t have another clear explanation
- Falling asleep unintentionally during meetings, while reading, or while driving
Many people dismiss these symptoms for years, blaming stress or aging. But if you’re getting seven or eight hours of sleep and still feel like you haven’t rested, your body may be waking itself up dozens of times per hour to reopen a collapsed airway, even if you don’t remember it.
A Quick Screening You Can Do Right Now
Doctors use a screening tool called the STOP-BANG questionnaire to assess your risk. It asks eight yes-or-no questions, each worth one point. A score of 3 or higher suggests a meaningful likelihood of obstructive sleep apnea. The questions cover:
- Snoring: Do you snore loudly?
- Tired: Do you often feel tired, fatigued, or sleepy during the day?
- Observed: Has anyone seen you stop breathing during sleep?
- Pressure: Do you have high blood pressure, or are you being treated for it?
- BMI: Is your body mass index above 35?
- Age: Are you over 50?
- Neck: Is your neck circumference greater than 16 inches (women) or 17 inches (men)?
- Gender: Are you male?
This isn’t a diagnosis, but it’s a useful starting point. If you score 3 or above, bring it up with your doctor. Even scoring 2 with significant daytime sleepiness is worth discussing.
Physical Traits That Increase Your Risk
Some people are structurally more prone to airway obstruction. A thicker neck is one of the strongest physical predictors, because extra tissue around the throat can press on the airway during sleep. A larger tongue or smaller jaw also contributes. When doctors look inside your mouth and can only see the hard palate (not the soft palate, tonsils, or uvula), that crowded airway anatomy roughly doubles the risk of obstructive sleep apnea, particularly if you also have nasal congestion.
Excess weight is an independent risk factor. Fat deposits around the upper airway narrow the space for air to pass through. But sleep apnea also occurs in people at a healthy weight, especially those with certain facial structures or enlarged tonsils. Don’t rule it out just because you’re not overweight.
How Sleep Apnea Gets Diagnosed
A CPAP machine is prescribed based on the results of a sleep study, not symptoms alone. The study measures your apnea-hypopnea index, or AHI, which counts how many times per hour your breathing partially or completely stops. Harvard Medical School classifies the results this way:
- Normal: fewer than 5 events per hour
- Mild: 5 to 14 events per hour
- Moderate: 15 to 29 events per hour
- Severe: 30 or more events per hour
CPAP is typically recommended for moderate and severe cases. For mild sleep apnea, your doctor may suggest alternatives first, like a dental appliance that repositions your jaw or lifestyle changes such as weight loss and sleeping on your side. But if mild apnea is causing significant daytime symptoms or you have cardiovascular risk factors, CPAP may still be the right call.
You have two options for testing. A home sleep apnea test is a simplified device you wear for one or two nights in your own bed. It tracks breathing effort, airflow, and oxygen levels. This is appropriate if your doctor suspects moderate to severe obstructive sleep apnea without other complicating conditions. If the home test comes back negative or inconclusive but your symptoms are convincing, an in-lab overnight sleep study (polysomnography) is the next step. In-lab studies are also preferred if you have heart disease, respiratory conditions, severe insomnia, or use opioid medications, since those situations require more detailed monitoring.
Why It Matters Beyond Tiredness
Untreated sleep apnea does more than ruin your energy. It’s a serious cardiovascular risk. According to a scientific statement from the American Heart Association, obstructive sleep apnea is associated with a twofold increase in the risk of cardiovascular events or death. Among people with high blood pressure, 30% to 50% also have sleep apnea. For those with resistant hypertension (blood pressure that stays high despite medication), the overlap reaches as high as 80%.
The connection runs both directions. Each time your airway closes and oxygen drops, your body releases stress hormones that spike your blood pressure and strain your heart. Over years, this contributes to atrial fibrillation, heart failure, stroke, and even sudden cardiac death. A long-term study of over 10,000 adults found that the strongest predictors of sudden cardiac death from sleep apnea were age over 60, oxygen levels dropping below 78% during sleep, and an AHI above 20. Treating with CPAP doesn’t just improve your sleep. It reduces the mechanical stress on your cardiovascular system night after night.
What Happens After You’re Prescribed a CPAP
If your sleep study confirms moderate or severe apnea, your doctor will write a prescription for a CPAP machine. You’ll be fitted with a mask (nasal, full-face, or nasal pillow style) and the machine’s pressure will be set based on your study results. Most people need a few weeks to adjust. The mask can feel strange at first, and some people experience dry mouth, nasal congestion, or difficulty falling asleep with it on. These are common and usually manageable with humidifier settings, mask adjustments, or a different mask type.
If you have Medicare, coverage includes a 12-week trial period for the machine and accessories. After that trial, your doctor needs to document that the therapy is working and you’re using it consistently. Medicare then continues paying rental costs for 13 months, after which you own the machine outright. Private insurance plans generally follow similar logic, requiring a confirmed diagnosis and evidence of compliance before covering long-term use. Most insurers track usage through the machine’s built-in data card, and the standard threshold is using the CPAP at least four hours per night on 70% of nights.
Signs You Should Get Tested Soon
Not every snorer needs a CPAP, but certain combinations of symptoms make testing more urgent. If you have loud snoring plus witnessed breathing pauses, that alone warrants a sleep study. If you’re waking up with headaches, struggling to stay awake while driving, or your blood pressure isn’t responding well to medication, sleep apnea could be the underlying cause your doctor hasn’t checked for yet.
The gap between having symptoms and getting diagnosed is often years. Many people assume their fatigue is normal or that snoring is harmless. Getting a sleep study is straightforward, increasingly done at home, and gives you a clear number that determines whether treatment would help. If your STOP-BANG score is 3 or higher, or your bed partner has ever described you gasping in your sleep, that’s enough reason to bring it up at your next appointment.