Should I Use CPAP When I Am Sick? Lessons from a Bad Cold

Getting sick when you rely on a CPAP machine can be challenging. Whether you’re dealing with a cold, flu, or seasonal allergies, the thought of using your CPAP while feeling congested or having a sore throat might seem a bit of a challenge.

Last month, I got absolutely slammed with one of the worst colds I’ve had in years. The kind where you wake up at 2 AM unable to breathe through either nostril, coughing into your CPAP mask, and seriously questioning whether this whole therapy thing is worth it when you’re this miserable.

I’ve been using CPAP for over 10 years to treat my severe sleep apnea. But here’s the thing nobody warns you about when they hand you your shiny new machine: what happens when you get sick?

And not just regular sick—I also have asthma, which made everything harder.

I spent six nights taking my ResMed AirFit F20 mask on and off multiple times per hour, dealing with increased congestion, and learning some hard lessons about CPAP hygiene during illness. So if you’re reading this while congested and miserable, wondering if you should just chuck your machine out the window for a few nights—I get it.

But here’s what I learned: yes, you should keep using your CPAP when sick. And I’m going to show you exactly how to make it work, even when it feels impossible.

Why I Almost Quit CPAP During My Cold (But Didn’t)

The first night of that cold, I woke up four times. Not because of sleep apnea events—because I literally couldn’t breathe through my nose and was desperately ripping my mask off to gasp through my mouth.

My asthma made the respiratory infection harder to manage, but skipping CPAP made everything worse.

But here’s what happened when I tried to skip CPAP a couple of years ago: I woke up even more exhausted. And I could feel my sleep apnea symptoms returning—the kind of bone-deep fatigue that reminded me why I started CPAP therapy in the first place.

Research backs this up. A study published in Sleep Medicine found that patients who maintained CPAP adherence during summer and autumn had fewer self-reported cold symptoms in winter, suggesting that consistent therapy supports immune function. When you’re sick, your body needs quality sleep more than ever to fight off infection—and untreated sleep apnea actively sabotages that recovery process.

Here’s why: sleep plays a crucial role in immune system function. Research published in the Journal of Experimental Medicine shows that good sleep supports normal production and programming of immune stem cells, which are fundamental to your body’s ability to fight infection. When you skip CPAP and allow your sleep apnea to go untreated, you’re fragmenting sleep and reducing oxygen levels at exactly the moment your immune system needs optimal support.

The Science: Why Sleep Matters When You’re Sick

Before I dive into the practical tips that got me through that miserable week, let’s talk about why continuing CPAP therapy during illness is so important.

Sleep Is Medicine for Your Immune System

Multiple studies have demonstrated that sleep and immune function are bidirectionally linked—meaning sleep affects your immune system, and your immune system affects your sleep. During nighttime sleep, your body increases production of cytokines associated with inflammation, which helps your immune system fight off infections and heal wounds.

Research published in Physiological Reviews found that observations of enhanced sleep in response to infectious challenges support the hypothesis that sleep is beneficial for host defense mechanisms and recovery. When rabbits with bacterial infections were allowed to sleep more, they had less morbidity and mortality compared to those whose sleep was disrupted.

Put simply: sleep is one of your immune system’s most powerful tools.

What Happens When You Skip CPAP While Sick

When you have untreated sleep apnea, here’s what happens:

Your breathing becomes disrupted throughout the night. When you add congestion and respiratory infection to the mix, sleep apnea events can become even more frequent. This is why understanding how CPAP machines work to maintain airway pressure is so important.

Your sleep becomes fragmented. Each apnea event partially wakes you, preventing deep restorative sleep. Research from Mount Sinai shows that sleep restriction alters the DNA structure of immune stem cells and increases inflammation—exactly what you don’t want when fighting a cold.

Your body can’t properly heal. A study in the journal Brain, Behavior, and Immunity found that chronic sleep deficiency is associated with increased inflammatory markers and immunodeficiency, including enhanced susceptibility to the common cold.

The Yale Medicine Sleep Center notes that individuals who consistently get less than seven hours of sleep are three times more likely to develop the common cold compared to those who get eight hours or more. While you’re already sick, you can’t afford to make your immune system even weaker.

How I Made CPAP Work During My Cold: Practical Strategies

Okay, so we’ve established that you should keep using CPAP when sick. But how do you actually make it tolerable? Here’s what worked for me during those six miserable nights.

1. Daily Cleaning Became Non-Negotiable

Listen: I’ll be honest with you. On normal nights, I sometimes skip a day of mask cleaning. I know I shouldn’t, but it happens.

During my cold? I cleaned everything. Every. Single. Day.

Here’s why this matters: when you’re sick, congestion increases. That gets into your mask, your tubing, and potentially your humidifier chamber. Research has shown that improperly cleaned CPAP equipment can harbor bacteria and lead to respiratory infections, including pneumonia.

A retrospective study of 246 sleep apnea patients found that those who didn’t clean their CPAP regularly experienced increased upper respiratory infections 57.1% of the time, compared to only 20% for those who cleaned regularly. When you’re already sick, the last thing you want is to breed additional bacteria in your equipment.

My daily cleaning routine during illness:

Every morning:

• Disassemble mask completely (cushion, frame, headgear)
• Wash the cushion and frame with warm water and mild soap
• Rinse thoroughly and air dry on a clean towel
• Empty humidifier chamber and wash it with warm soapy water
• Inspect tubing for any visible moisture

Every 2-3 days:

• Wash tubing with warm, soapy water
• Hang to dry completely before reassembly

2. Humidity Became My Best Friend

My ResMed AirSense 10 has a heated humidifier, and during my cold, I cranked it up to the maximum comfortable level.

Research published in Respiratory Care found that heated humidification with CPAP improves therapy adherence in patients with nasopharyngeal symptoms. The warm, humidified air helped soothe my irritated airways and made breathing feel less like inhaling sandpaper.

But there’s a balance to strike. Some studies suggest that excessive humidity can worsen nasal congestion for certain people, so I started at a moderate level and gradually increased until I found my sweet spot.

I also used heated tubing, which made a huge difference. Without it, I experienced “rainout”—condensation forming in the tubing that would occasionally send droplets of water shooting into my mask. Not pleasant when you’re already struggling to breathe.

3. I Switched to My Full-Face Mask (And You Might Need To)

Normally, I use my ResMed AirFit F20 full-face mask because I’m a mouth breather. But if you typically use a nasal mask or nasal pillows, you might need to temporarily switch to a full-face option when congested.

Why? When your nose is completely blocked, a nasal-only mask becomes useless. The pressurized air has nowhere to go, and you end up breathing through your mouth, which defeats the entire purpose of therapy. Research shows that nasal congestion can lead to significant air leaks through the mouth during CPAP therapy, compromising its effectiveness.

If you don’t have a full-face mask and find yourself repeatedly removing your nasal mask to breathe, talk to your sleep equipment supplier about getting one. Many insurance plans cover mask replacements, and having a backup mask for illness situations is invaluable.

4. Saline Rinses Saved My Sanity

About 30 minutes before bed, I used a saline nasal rinse. Not the gentle spray bottle kind—I used a proper neti pot with a full rinse.

This made an enormous difference in my ability to tolerate CPAP. The rinse cleared out mucus, reduced inflammation, and gave me at least a few hours of slightly better nasal breathing before the congestion returned.

Multiple CPAP therapy guides recommend nasal saline irrigation for managing congestion during illness, and I now understand why. Just make sure to:

• Use distilled or sterile water (never tap water)
• Clean your neti pot thoroughly after each use
• Allow at least 30 minutes between rinsing and putting on your CPAP mask

The water needs time to drain completely, or you’ll end up with water running down your throat when you lie down with the mask on. Trust me on this one.

5. The Mask-On, Mask-Off Dance (And Why I Persisted)

I’m not going to lie to you: there were nights during that cold when I took my mask off and on six or seven times. I’d wake up congested, remove the mask, clear my airways, wait a few minutes, then put the mask back on.

It was exhausting and frustrating.

But here’s what I noticed: even with the interruptions, I felt better in the morning than I did on the one night I skipped CPAP entirely. My CPAP data showed that even with the mask-off periods, my AHI remained below 5 for the hours I was using therapy.

The key was not letting perfect be the enemy of good. Some CPAP is better than no CPAP, even when you’re sick.

6. I Adjusted My Sleep Position

Sleeping flat on my back made congestion significantly worse. I propped myself up with two pillows, creating about a 30-degree angle.

Cleveland Clinic research suggests that elevating your head above your heart allows fluids and blood to drain from nasal structures, providing natural decongestion. This position also helped prevent post-nasal drip from triggering coughing fits when I was wearing my mask.

I also found that sleeping on my side helped more than back sleeping. The combination of elevation plus side-sleeping gave me the best chance of maintaining CPAP therapy through the night. Using a CPAP pillow designed for side sleepers can make this position more comfortable.

Managing CPAP with Asthma During Illness

Having asthma added another challenge to managing CPAP during my cold. The respiratory infection triggered my asthma, which made breathing even more difficult.

What helped:

• Keeping my rescue inhaler on my nightstand
• Removing the mask if I needed my inhaler, then replacing it after 10-15 minutes
• The CPAP pressure actually helped keep my airways open once the medication took effect

If you have asthma and sleep apnea, don’t let a cold derail both therapies. Work with your doctor to manage both conditions during illness.

The Equipment Replacement Question

After that week of illness, I had to make some decisions about equipment replacement.

What I Replaced Immediately:

Mask cushion: Even with daily cleaning, my AirFit F20 cushion had been exposed to illness, so I replaced it. Cushions should be replaced every 1-3 months anyway, and illness is a good trigger for replacement.

What I Cleaned Thoroughly But Kept:

Tubing: I washed it multiple times with hot soapy water and let it dry completely. As long as tubing isn’t cloudy, stiff, or visibly damaged, it can be thoroughly cleaned and reused.

Humidifier chamber: Deep cleaned with vinegar solution (1 part white vinegar to 3 parts distilled water) to kill any bacteria. ResMed chambers should be replaced every 6 months, and I was only two months into using mine.

Mask frame and headgear: Thoroughly washed and disinfected.

A study published in the Journal of Clinical Sleep Medicine found no significant association between properly cleaned PAP equipment and increased respiratory infections. The key word is “properly cleaned.” When you’re sick, that means daily attention to every component that touches your face or your breath.

What I Wish Someone Had Told Me Before That Cold

Looking back on those six miserable nights, here’s what would have made the experience easier:

1. Stock Backup Supplies Before You Get Sick

I keep a bag of “CPAP illness supplies” now:

• Backup mask cushion
• Saline nasal rinse supplies
• Distilled water for the humidifier (I ran out on day three)
• Extra-long CPAP tubing (in case the standard length becomes uncomfortable with elevation)
• Mask liners to reduce skin irritation during frequent mask adjustments

2. Track Your CPAP Data

I monitor my therapy data, which was incredibly helpful during my illness. I could see that even with interruptions, I was still getting beneficial therapy for the hours I wore the mask.

This data also helped me identify patterns—like noticing that I had fewer disruptions when I slept on my left side versus my right side. Understanding your CPAP compliance patterns can help you optimize therapy even when sick.

3. Lower Your Expectations

On a normal night, I aim for 7-8 hours of CPAP use. During my cold, I celebrated getting 5-6 hours, even if it was broken into multiple segments.

CPAP compliance standards often require 4 hours minimum for insurance purposes, but even 3-4 hours of quality therapy is better than none. Don’t beat yourself up for not achieving perfect adherence when you’re sick. Focus on how to use your CPAP machine effectively during the hours you can tolerate it.

4. Communicate with Your Sleep Doctor

If you are finding it all too difficult, then reach out to your sleep doctor. I am not medically trained in any way.

The Cleaning Controversy: CPAP Sanitizers

During my cold, several people suggested I invest in an automated CPAP sanitizer like SoClean or Lumin. Here’s my honest take:

The FDA has issued warnings about certain CPAP sanitizers, particularly ozone-based ones, noting that they haven’t been proven safe or effective and may damage equipment. Research on CPAP cleaning shows that good old-fashioned soap and water, done consistently, is the most reliable cleaning method.

I chose to stick with manual daily cleaning. It takes about 10 minutes each morning—longer than I’d like, but far cheaper and safer than automated sanitizing systems.

If you’re considering a CPAP sanitizer, talk to your sleep doctor first and check manufacturer guidelines for your specific equipment.

Long-Term Lessons: Preparing for Future Illnesses

That cold taught me that illness management needs to be part of my ongoing CPAP strategy. Here’s what I do differently now:

Preventive Maintenance

Weekly deep cleans: Every Sunday, I do a thorough wash of all components, not just the daily quick clean.

Backup equipment on hand: Extra cushions and distilled water are now part of my standard supplies.

Immune System Support

Research consistently shows that consistent CPAP adherence supports immune function. I’ve committed to maintaining my therapy even on weekends and holidays, knowing that this consistency may actually reduce my cold frequency and severity.

I also focus on:

• Maintaining consistent sleep schedules (7-8 hours nightly)
• Managing my asthma proactively with controller medications
• Staying current on vaccinations, including flu shots
• Using my CPAP during allergy season, not just when I’m sick

The Bottom Line: CPAP Helped Me Heal Faster

Here’s what surprised me most about that miserable week: by day six, my cold symptoms were noticeably better. By day seven, I was back to normal.

Comparing this to pre-CPAP colds, I typically suffered for 10-14 days. The research on CPAP adherence and reduced cold symptoms seems to hold true in my experience.

Did CPAP make those six nights comfortable? Absolutely not.

Did it help me heal faster by supporting better sleep quality? I believe it did.

Would I do it again? Without question.

Your Action Plan for Using CPAP When Sick

If you’re sick right now and wondering what to do, here’s my condensed action plan:

Tonight:

1. Clean all your CPAP equipment thoroughly
2. Use saline nasal rinse 30 minutes before bed
3. Set up extra pillows for elevation
4. Keep tissues, water, and rescue medications within reach
5. Consider switching to a full-face mask if nasal congestion is severe
6. Increase your humidifier setting if available
7. Review tips for getting used to CPAP during challenging times

Tomorrow:

1. Clean equipment again (yes, daily)
2. Message your sleep doctor if symptoms are severe
3. Track your CPAP data to monitor adherence
4. Take mask breaks as needed when congestion is severe
5. Review troubleshooting common CPAP problems if needed

For recovery:

1. Continue CPAP therapy even if interrupted
2. Replace cushions after illness resolves if needed
3. Deep clean all equipment
4. Return to normal cleaning schedule once healthy

When to Seek Medical Help

Contact your doctor if you experience:

• Fever over 101°F lasting more than 3 days
• Severe difficulty breathing
• Chest pain or pressure
• Inability to use CPAP for more than 2-3 nights
• Worsening symptoms after initial improvement
• Symptoms lasting more than 10 days

For asthma patients specifically: contact your doctor if you need your rescue inhaler more than twice per day or if normal asthma symptoms worsen significantly.

Final Thoughts: You Can Do This

I know how miserable it is to be sick and struggling with CPAP. I’ve been there—coughing into my mask at 3 AM, blowing my nose for the seventh time that hour, seriously considering whether my sleep apnea is really worth this level of suffering.

But after 10+ years with CPAP and multiple illnesses, I can tell you with certainty: maintaining therapy during illness makes a difference. Your sleep quality improves. Your immune system gets the support it needs to fight off infection.

Is it easy? No. Is it comfortable? Definitely not. Is it worth it? For me, absolutely yes.

You’ve already done the hard work of getting diagnosed, getting your CPAP machine, and learning to use it regularly. Don’t abandon that progress just because you have a cold. Clean your equipment, make adjustments as needed, and persist through the discomfort.

Your body will thank you.

References

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⚠️ MEDICAL DISCLAIMER This blog provides general information only and is not a substitute for professional medical advice, diagnosis, or treatment. Sleep apnea is a serious condition, and CPAP equipment should be used under proper medical supervision. Always consult your doctor or sleep specialist before starting, stopping, or changing any therapy. I share personal experiences as a CPAP user, not as a medical professional. Individual results vary. For medical guidance, please consult a qualified clinician or the American Academy of Sleep Medicine (aasm.org).