Common CPAP Problems and How to Fix Them

If you wake up tired, fighting your mask, or bloated with air, you are not failing at CPAP, you are running into the same handful of problems almost everyone hits at the start. Nearly all of them are fixable, usually with a small change to your mask, your humidifier, or your pressure. Below is every common CPAP side effect, why it happens, and exactly how to fix it. Do not give up in the first two weeks, that is when most people quit, and it is also when most of these issues are easiest to solve.

Common CPAP problems at a glance

Here is the quick map of what goes wrong, why, and the fix. Each is covered in detail below.

Mask leaks and a poor fit

Leaks are the most common CPAP complaint, and they usually trace back to fit. As Mayo Clinic puts it, "if you have to tighten the straps often to prevent air leakage, the mask does not fit properly" (Mayo Clinic). ResMed adds simply that "a well-fitting mask is more effective because it's less likely to leak" (ResMed). What to do:

• Adjust the straps evenly, snug but not tight. Overtightening causes both leaks and marks.
• Try a different size or style. Many masks come in FitPacks so you can test cushion sizes.
• Add a mask liner as a soft barrier that also absorbs moisture.
• Replace worn parts: cushions about every 3 months, headgear about every 6 months. Worn cushions lose their seal.

Dry mouth, nose, and throat

Waking up parched is common and very fixable. Cleveland Clinic notes these "side effects typically happen due to cold, dry air. Using a heated humidifier can often help" (Cleveland Clinic). Mayo Clinic adds that a "heated humidifier that attaches to the air pressure machine and a heated tube also may help" (Mayo Clinic). Your options:

• Turn up your heated humidifier, starting low and increasing until dryness eases.
• If you breathe through your mouth, a chin strap keeps your mouth closed. Mayo notes "a chin strap may help keep your mouth closed and reduce the air leak if you wear a nasal mask."
• Or switch to a full-face mask like the AirFit F40 or F&P Evora, which cover mouth and nose.
• Use a saline spray at bedtime. Mayo confirms "using a nasal saline spray at bedtime also can help your symptoms."

Nasal congestion and a stuffy nose

Congestion is one of the most reported effects. The National Heart, Lung, and Blood Institute lists that "side effects of CPAP treatment may include congestion, runny nose, dry mouth, or nosebleeds" (NHLBI). Warm, moist air is the answer: run your heated humidifier and a heated tube, use a saline rinse before bed, and treat underlying allergies. If congestion is forcing you to mouth-breathe, a full-face mask keeps therapy effective.

Skin irritation and pressure sores

Red marks and irritation usually mean the mask is too tight or the wrong size. Cleveland Clinic notes that "CPAP masks may cause skin irritation or redness. But using the right size mask and padding can minimize these issues" (Cleveland Clinic). Fixes:

• Loosen to a snug, not tight, fit and confirm the cushion is your correct size.
• Add mask liners or gel nose pads as a barrier between skin and silicone.
• Wash the cushion and headgear daily with mild soap and water to remove oils and bacteria.
• Replace a worn mask on schedule, since old silicone hardens and digs in.

Claustrophobia and feeling closed in

If the mask feels smothering, you have options. The least-coverage choice is a nasal pillow mask like the AirFit P10, which rests under the nose and leaves your face open. Mayo Clinic recommends desensitizing first: "practice using your mask while you're awake. First, just hold it up to your face without any of the other parts" (Mayo Clinic). Pair that with slow breathing (inhale 4, hold 2, exhale 6) to settle the nervous system. Our team walks through the side effects nobody warns you about, and how to fix them, here:

Aerophagia (swallowing air) and "CPAP belly"

Bloating, burping, and gas from CPAP have a name: aerophagia. It is common, and a study in the journal Sleep and Breathing describes how "pressurized air can leak into the stomach causing belching, abdominal distention, discomfort, and flatulence, among other symptoms" (Hillamaa et al., 2025). What helps:

• Ask your provider about your pressure. If it is higher than you need, you swallow more air. Expiratory pressure relief (EPR) or a BiPAP can help.
• Try the V-COM, a small in-line device that softens the pressure spike on inhale to reduce air swallowing.
• Consider a different mask style, and avoid sleeping flat on your back.

Rainout, dry eyes, and noise

• Rainout (water in the hose): warm humid air cools in the tube and condenses. A heated tube keeps the air warm end to end; you can also lower the humidity or set the machine below bed level. A hose cover helps too.
• Dry or irritated eyes: almost always an upward mask leak blowing air toward your eyes. Refit or resize the mask to stop the leak.
• Noise: modern machines are quiet. If yours is loud, check that the air filter is clean and the mask vents are not blocked, and make sure there are no leaks whistling at the seal.

When to call your doctor or supplier

Give yourself the first two weeks to adjust, and lean on help rather than quitting. If a problem persists after you have tried the fixes above, if you have chest discomfort, or if therapy just does not feel like it is working, reach out to your sleep provider or a Sleeplay CPAP expert. Most issues come down to mask fit, humidity, or pressure, and all three are adjustable. Browse CPAP machines and accessories if you need to upgrade a part.

Frequently Asked Questions

Why do so many people quit CPAP?

Most people quit in the first few weeks over fixable problems: a leaky or uncomfortable mask, dry mouth, or swallowing air. Adjusting the mask, humidity, or pressure usually solves it, so it is worth pushing through and asking for help.

Is there such a thing as a CPAP belly?

Yes. CPAP belly is the bloating from aerophagia, when you swallow pressurized air. It causes gas, burping, and abdominal distention. Lowering pressure, using EPR or a device like the V-COM, and changing mask style usually help.

Are CPAP side effects dangerous?

Most CPAP side effects, like dry mouth, congestion, mask marks, and bloating, are uncomfortable but not dangerous, and they are fixable. Untreated sleep apnea is the real danger. If you have chest discomfort or a problem that will not resolve, contact your provider.

What is the most common CPAP problem?

Mask leaks and poor fit are the most common problem, usually from the wrong size, a worn cushion, or straps that are too tight. Refitting or resizing the mask solves most leaks.

Can CPAP cause bloating and gas?

Yes, through aerophagia, or swallowing air. It affects a large share of users. Talk to your provider about your pressure, try expiratory pressure relief or the V-COM, and avoid sleeping flat on your back.

How long does it take to get used to CPAP?

Most people adjust within a few weeks. The first two weeks are the hardest and when most fixable problems show up, so stick with it and tweak the mask, humidity, and pressure as needed.

How do I fix CPAP dry mouth?

Turn up your heated humidifier, add a heated tube, and if you breathe through your mouth, use a chin strap or switch to a full-face mask. A saline spray at bedtime also helps keep your nose and throat moist.

References

• Mayo Clinic. "CPAP machines: Tips for avoiding 10 common problems." mayoclinic.org
• Cleveland Clinic. "CPAP Machine." my.clevelandclinic.org
• National Heart, Lung, and Blood Institute (NIH). "CPAP." nhlbi.nih.gov
• ResMed. "7 common CPAP mask problems and how to solve them." resmed.co.uk
• Hillamaa A, Mustonen V, Bachour A. "Aerophagia during CPAP." Sleep and Breathing, 2025. PMC (PMC12101993)