Some airflow through a PAP mask is intentional through its vent. An unintended leak is different: it can create noise, blow air toward the eyes, cause dryness, disturb sleep and make therapy data harder to interpret.
Common causes of unintended leak
- Incorrect mask size or cushion position
- Headgear that is too loose—or excessively tight
- Worn, oily, damaged or distorted cushion material
- Tubing pulling on the mask during sleep
- Mouth leak while using a nasal interface
- Changes in sleep position or facial contact with the pillow
Safe troubleshooting sequence
- Identify where the leak is coming from.
- Re-seat the mask according to the manufacturer's fitting instructions.
- Check size and headgear adjustment without overtightening.
- Inspect the cushion, frame, headgear and tubing for wear or damage.
- Review mouth leak or nasal obstruction if using a nasal mask or pillows.
- If leak remains substantial, ask the equipment provider or clinical team for help.
Do not solve leak by changing treatment pressure yourself
A leak problem and a pressure prescription are different issues. AASM guidance emphasizes follow-up and troubleshooting during PAP therapy. Source: AASM.
For mask selection, see the CPAP mask fitting guide. For dryness, see dry mouth or nose with CPAP.
Frequently asked questions
Should I tighten the mask until all air stops?
No. PAP masks have intentional vent flow. Overtightening can worsen comfort and sometimes distort the seal.
Why is air blowing into my eyes?
Leak near the upper cushion can direct airflow toward the eyes; re-seating, sizing and cushion condition should be checked.
When should I replace the cushion?
Use condition, seal performance and the exact manufacturer's replacement guidance rather than a universal calendar.
Sources
Medical note: Persistent therapy problems should be discussed with the treating clinical team; do not independently alter prescribed pressure.
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