Waking up with a bloated stomach, burping, or gas after starting CPAP has a specific name — aerophagia — and a specific, well-understood cause.
Why it happens
Aerophagia happens when pressurized air is swallowed into the esophagus and stomach instead of moving smoothly into your lungs. It's more common with higher pressure settings, sleeping on your back, or nasal congestion that forces mouth breathing against pressurized air.
How to fix it
- Try sleeping on your side. Side-sleeping reduces the chance of air being pushed down the esophagus.
- Ask your doctor about a pressure adjustment. Sometimes a slightly lower pressure, or a switch to an auto-adjusting (APAP) machine, reduces swallowed air significantly.
- Use the ramp feature. Starting at a lower pressure and increasing gradually can reduce air swallowing as you fall asleep.
- Elevate your head slightly. A wedge pillow or adjustable bed head can reduce reflux-related aerophagia.
- Rule out mouth breathing. If your mouth is open, air pressure has a more direct path to your esophagus — a chin strap or full-face mask may help.
🎟️ Wedge pillows and chin straps that help with aerophagia are available at TheCPAPBox — use code FRIEND5 at checkout.
Shop TheCPAPBox →See your doctor if: bloating is severe, painful, or accompanied by reflux symptoms, vomiting, or chest discomfort — and always before adjusting your prescribed pressure yourself.
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