CPAP Problems? Common Issues, Practical Fixes, and When to Get Help

If you’ve just started CPAP (continuous positive airway pressure) therapy and it feels strange, uncomfortable, or hard to get used to, that’s common, not a sign you’re doing it wrong. This article is for people who have already been diagnosed with obstructive sleep apnea (OSA) and prescribed CPAP or another PAP therapy, and who want practical help with the day-to-day problems that come with using it. If you’re instead trying to work out whether snoring or other symptoms might mean sleep apnea in the first place, our Snoring vs. Sleep Apnea guide covers that separate question.

Everything here is about CPAP specifically, which is the standard treatment for obstructive sleep apnea. If you’ve been prescribed a different kind of PAP device — a bilevel (BPAP) or auto-adjusting (APAP) machine, for example — some of the fixes below still apply, but check with your provider about anything specific to your device.

Why CPAP Can Feel Uncomfortable at First

Wearing a mask and breathing pressurized air all night is a genuine adjustment, and it’s one your body gets used to gradually rather than all at once. Clinical guidance from the American Academy of Sleep Medicine (AASM) treats this adjustment period as something to actively support, not just wait out — it recommends behavioral and troubleshooting help specifically during the initial weeks of therapy, because how consistently someone uses CPAP early on tends to predict how consistently they use it long-term.

Mayo Clinic’s guidance is direct about the first stretch of therapy: if you run into problems in the first two weeks of starting CPAP, call your healthcare professional or CPAP supplier. If your first mask or machine doesn’t work for you, there are many other types to try, and most masks can be adjusted for a better fit. Getting the right setup early meaningfully improves your odds of sticking with therapy long-term — so troubleshooting early isn’t a sign of failure, it’s the normal and expected part of starting CPAP.

Common CPAP Problems and Practical Fixes

Most of what makes CPAP hard to live with at first falls into a handful of categories, each with its own specific fixes.

Mask Leaks, Poor Fit, and Uncomfortable Masks

A leaky or poorly fitting mask is one of the most common CPAP complaints, and it’s often the root cause behind several other problems — dry eyes, a dry or stuffy nose, dry mouth, and skin irritation can all trace back to air escaping where it shouldn’t. Mayo Clinic notes that a properly fitting mask shouldn’t be uncomfortable, cause pain, or make any sound of leaking air; if you’re having to tighten the straps repeatedly to stop leaks, that’s usually a sign the mask itself is the wrong fit, not that it needs to be tighter.

There’s no single “right” mask — there are several styles, and which one fits well depends on your face shape, whether you breathe through your mouth or nose at night, and how much you move around in your sleep:

• Full-face masks cover the nose and mouth. They work well for mouth breathers and people who move a lot during sleep, but some people find them more claustrophobic.
• Nasal masks cover just the nose. The AASM’s clinical guideline notes that nasal and intranasal interfaces tend to produce fewer side effects than full-face options for people who can tolerate them.
• Nasal pillow masks deliver air directly through small cushions at the nostrils. They’re less obtrusive, often more comfortable for people who feel confined by a full mask, and don’t interfere with glasses or reading — but they may not hold up as well for people who move around a lot or have a stuffy nose.

Sizing matters as much as style: being a given size in one brand’s mask doesn’t mean you’re the same size in another. Your CPAP supplier or sleep specialist can show you how to adjust your specific mask for the best fit, and it’s worth having your mask fit checked at least once a year, since weight changes can affect how well a mask that used to fit still seals. If your mask seems to have developed a leak you can’t resolve, check it for cracks, stiffness, or wear before assuming it’s a fit problem.

Dry Mouth, Nasal Congestion, and Skin Irritation

Nasal dryness or irritation, dry mouth, sore throat, and sinus irritation are among the side effects the AASM’s clinical guideline specifically flags as reasons to consider heated humidification, which adds moisture to the pressurized air before it reaches you. The trade-off is that humidification can cause condensation in the tubing (more on that below), which is a reasonable annoyance to accept in exchange for a less dry nose and throat.

A few targeted fixes, drawn from Mayo Clinic and the American Thoracic Society’s (ATS) patient troubleshooting guidance:

• Dry or stuffy nose: Check your mask for leaks first, since leaking air dries out the nose. Turn up your humidifier’s heat setting, try a nasal saline spray at bedtime, or ask your provider whether a prescription nasal spray makes sense for you.
• Dry mouth: This is especially common if you breathe through your mouth or sleep with it open. A chin strap (for nasal masks) or switching to a full-face mask can help keep air from escaping through an open mouth. Artificial saliva gels, sprays, or specific mouthwashes designed for dry mouth can also help.
• Skin irritation, marks, or sores: Usually traced back to a leaking or poorly fitting mask. Mask liners and petroleum-free moisturizers can reduce facial discomfort, and resizing or trying a different mask style can resolve recurring irritation. Tell your care team about any skin irritation or sores rather than just working around them — they may want to check your fit.

Pressure Discomfort and Aerophagia (Swallowed Air)

Some people find the steady pressure of CPAP, especially at the start of the night, uncomfortable — whether that’s the sensation of forced air or difficulty exhaling against it. Most CPAP machines include a built-in “ramp” feature that starts at a lower pressure and gradually increases to your prescribed setting as you fall asleep. Some machines also offer an exhalation pressure-relief setting that slightly eases pressure specifically when you breathe out. Depending on your specific device, these comfort features are often yours to adjust directly, using your machine’s own controls — check your device instructions, or ask your provider which settings you’re able to use yourself. Either way, they work within the pressure range your provider has already prescribed, which is different from the prescribed pressure number itself: that’s a setting that should only be changed by your sleep specialist, based on your actual breathing data.

Swallowing air during CPAP use, known as aerophagia, can cause bloating, gas, or belching. How common this is varies across studies, so this article focuses on what tends to help rather than a single prevalence figure. The ATS’s troubleshooting guidance for stomach discomfort and excess gas suggests trying a different sleeping position, using an exhalation pressure-relief setting if your machine has one, or discussing with your provider whether switching to an auto-adjusting (APAP) or bilevel (BPAP) machine might help. None of this is a change to make unilaterally; it’s a conversation to have with whoever manages your therapy.

Claustrophobia and Trouble Falling Asleep With CPAP

Feeling confined or anxious while wearing a mask that covers part of your face is a common reaction, not an unusual one — Mayo Clinic treats it as one of the standard problems CPAP users run into, not a rare complication. Mayo Clinic describes a specific, gradual approach that’s worth trying before assuming a mask simply isn’t for you:

1. Hold the mask up to your face, without straps, while you’re awake.
2. Once that’s comfortable, put the mask on with the straps, still without turning the machine on.
3. Hold the mask with its hose attached to your face, then try turning the machine on (the ramp feature can make this easier).
4. Wear the mask with the straps on while the machine is running, while you’re awake and doing something else — reading or watching TV works well.
5. Once that feels manageable, try sleeping with the full setup — mask, straps, and machine running.

Relaxation techniques like deep breathing or meditation, and in some cases talk therapy for the anxiety itself, can help alongside this gradual approach. If claustrophobia persists despite trying it, talk to your sleep specialist or CPAP supplier — a different mask size or a nasal-pillow style, which covers less of the face, is a reasonable next step.

Trouble falling asleep with CPAP on often responds to the same daytime-wear strategy: getting used to the feel of the mask and the sensation of the pressurized air while you’re awake makes it easier to fall asleep with it on at night. General sleep habits — regular exercise, avoiding caffeine and alcohol close to bedtime, and a calm wind-down routine — matter here too, and Mayo Clinic specifically mentions a white noise machine as a reasonable aid for people who find the mask or machine distracting at bedtime. If you try one, our guide to sound machine volume and placement covers how to use one safely.

Machine Noise, Tubing Condensation, and Cleaning

Most current CPAP machines run quietly, but if yours is noisier than expected, check that the air filter is clean and not blocking airflow — a clogged filter is a common, easily fixed cause of extra noise. If cleaning the filter doesn’t help, ask your provider or CPAP supplier to check that the machine itself is working correctly. If it’s working fine and the noise still bothers you, earplugs, a white noise machine, or simply moving the machine farther from the bed (using extra tubing length if your machine supports it) can help.

Condensation building up inside the tubing — sometimes called “rainout” — is a known trade-off of heated humidification, which otherwise helps with dryness. The ATS’s troubleshooting guidance suggests lowering your humidifier’s heat setting, keeping the bedroom a bit warmer, insulating the tubing (a fleece tube cover works, or simply tucking it under a blanket against your chest), or using heated tubing if your machine supports it.

On cleaning: the FDA’s standard guidance is to follow your CPAP manufacturer’s own instructions, which for most masks and tubing means nothing more than mild soap and water. The Sleep Foundation recommends cleaning the mask and tubing daily, since germs, mold, and dust can collect inside the equipment.

Be cautious of devices marketed as ozone gas or ultraviolet (UV) light CPAP cleaners: the FDA has warned that ozone can leak from the equipment during cleaning and that ozone levels inside the equipment can remain above safe limits for hours afterward, with reports linking ozone exposure to asthma attacks, headaches, and breathlessness, and it similarly has no evidence that UV-light cleaning devices protect users from unsafe UV exposure. There’s one narrow exception: the FDA has authorized a specific ozone-based device as an add-on for reducing bacteria on certain CPAP masks and hoses, but only when used exactly as directed, alongside your regular cleaning routine rather than as a replacement for it. That one narrow authorization doesn’t make ozone devices broadly safe or approved: the FDA’s safety and effectiveness concerns remain for any ozone or UV device that isn’t specifically authorized for its claimed use, and beyond this one add-on, the FDA has not cleared or approved any device for general cleaning, disinfecting, or sanitizing of CPAP equipment. Plain soap and water, on the schedule your manufacturer recommends, is the approach actually supported here for routine cleaning — not an added gadget.

It’s also worth replacing supplies on schedule rather than waiting for them to visibly wear out. The National Heart, Lung, and Blood Institute (NHLBI) recommends refilling prescriptions on time for parts that need regular replacement, including tubing, masks, and air filters.

Still Tired Despite Using CPAP

Using CPAP consistently and correctly doesn’t necessarily mean daytime sleepiness disappears immediately — it can take time. But ongoing tiredness despite real, consistent use is worth raising with your sleep specialist rather than assuming either that the device doesn’t work for you or that nothing can be done. Most modern machines record usage data — how many hours you use it and how well it’s controlling your breathing events — and your provider (and sometimes your insurer) may review that data at follow-up visits. That data is genuinely useful for figuring out whether the issue is the settings, the mask fit, inconsistent use, or something else entirely contributing to the tiredness that isn’t related to sleep apnea at all. If general daytime tiredness despite what feels like adequate sleep is the bigger puzzle, Why Am I Still Tired After 8 Hours of Sleep? covers the wider range of possible explanations beyond CPAP use itself. In the meantime, if you’re feeling sleepy enough that it’s hard to stay alert during normal daily activities, don’t drive — the NHLBI’s own guidance is to pay attention to that symptom and avoid driving while tired or sleepy, regardless of how consistently you’re using CPAP.

When to Contact Your Sleep Specialist or CPAP Supplier

A few general principles are worth keeping in mind as you work through any of the problems above:

• A new machine isn’t usually the first fix. Many of the problems covered in this article come down to mask fit, settings, or humidification — not a defective or inadequate device. Refitting, resizing, or changing mask styles, and working with your provider on settings, resolves discomfort for many people before a different machine type is worth discussing.
• Don’t change your prescribed pressure number yourself. Comfort features like ramp and exhalation pressure relief are often adjustable directly on your own device — check your manual or ask your provider which settings are yours to use — but they work within the pressure range you’ve been prescribed. The prescribed pressure number itself should only be changed by your sleep specialist, based on your actual breathing data.
• Persistent follow-up is normal, not a sign something’s wrong with you. The AASM’s clinical guideline specifically calls for more frequent follow-up for people having ongoing difficulty with PAP, with yearly check-ins once things have stabilized. If you’re still working through problems months in, that’s a reason to stay in touch with your care team, not a reason to feel like you’re failing at something that should already be easy.

This article is educational and isn’t a substitute for guidance from the sleep specialist or equipment supplier managing your specific therapy. Read our full medical disclaimer for more, and see how we research this kind of content.