Troubleshooting
CPAP Side Effects (And What Actually Fixes Them)
Dry mouth, red marks, bloating, rainout, sore eyes. Every common CPAP side effect, why it happens, and the fix — ordered from cheapest to most involved.
Independent · source-cited · updated
Sleep apnea and CPAP, explained like a person is talking to you
Most CPAP advice is either a sales page or a research abstract. This site is neither. Every clinical claim links to its source, every paid link is labelled, and when the evidence is genuinely unclear we say so instead of guessing.
- No sponsored rankings. Nobody can pay to be recommended.
- Sources on every page. Numbered, linked, and dated.
- Plain language. Written for 2am, not for a journal.
Where are you in this?
Just diagnosed
You have a sleep study result and no idea what it means
Start with what AHI actually measures, what the severity bands mean, and what happens next.
Start with the basics →First 30 days
You have a machine and it is not going well
Almost everyone hates CPAP for the first few weeks. Here is what to fix, in what order.
Fix what is bothering you →Long-term user
You want your therapy to work better than it does
Read your own data, get the mask right, and stop overpaying for supplies you are owed.
Go deeper →The guides worth your time first
Masks & Fit
How to Choose a CPAP Mask (Without Ordering Three Wrong Ones)
Mask choice decides whether you stick with therapy. Here is how to narrow it down by how you sleep, breathe, and what has already annoyed you.
Sleep Apnea Basics
What Is a Good AHI? Making Sense of Your Sleep Apnea Number
AHI is the number your diagnosis, your severity, and often your insurance coverage hangs on. Here is what it measures, what the bands mean, and where it misleads.
Browse by topic
Sleep Apnea Basics
What sleep apnea is, how it is diagnosed, and what the numbers mean.
Masks & Fit
Choosing between mask styles, getting a seal, and fixing leaks.
Machines & Settings
CPAP vs APAP vs BiPAP, pressure settings, and reading your data.
Troubleshooting
Dry mouth, aerophagia, red marks, and the other reasons people quit.
Cleaning & Care
How to actually clean your equipment, and what to replace when.
Insurance & Costs
Compliance rules, Medicare, and what CPAP therapy really costs.
Travel
Flying, camping, and staying on therapy away from an outlet.
Alternatives to CPAP
Oral appliances, surgery, positional therapy, and weight management.
Latest
Troubleshooting
CPAP Aerophagia: Why You're Swallowing Air and How to Stop
Bloating, belching and stomach pain from CPAP have a name and a set of fixes. Here's what causes aerophagia and what to change first.
Alternatives to CPAP
Alternatives to CPAP: What Actually Works and Who It Works For
Oral appliances, positional therapy, surgery, nerve stimulation, weight loss and new medications. An honest look at the options beyond a mask.
Insurance & Costs
CPAP Compliance Rules: The 4-Hour Rule, Explained Properly
Insurers require documented CPAP use before they'll keep paying. Here are the actual Medicare rules, what the clock is, and what happens if you miss it.
Troubleshooting
CPAP Dry Mouth: Why It Happens and How to Actually Stop It
Waking with a mouth like sandpaper usually isn't a humidity problem — it's a leak problem. Here's the fix ladder, cheapest first.
Troubleshooting
Your First 30 Days on CPAP: What's Normal and What Isn't
The adjustment period is the hardest part and most people are told nothing about it. A realistic week-by-week guide to getting through it.
Masks & Fit
How to Fix CPAP Mask Leaks (Start by Loosening the Straps)
Leaks wake you up, dry your mouth, and wreck your therapy. Here's how to diagnose where yours is coming from and fix it properly.