Your first 30 days on CPAP: what's normal, what's fixable, and when to call

The first month decides most CPAP outcomes, and not because the therapy fails — because solvable problems go unsolved long enough to become quitting. It helps to know what's simply normal: feeling odd about the mask for a week or two, some nights of shorter use while you adapt, mild nasal dryness, and waking occasionally to find you've removed the mask in your sleep. None of these are failure; they're the adjustment window doing what it does.

The fixable list has names. Dryness and congestion usually answer to humidification settings, which most modern machines auto-adjust but all allow manual tuning. Feeling like you're fighting the pressure at bedtime answers to the ramp feature, which starts low and climbs as you fall asleep. Red marks or leaks answer to strap tension — almost always over-tightened, which we've covered in detail in our mask-fit piece. Swallowing air answers to a pressure conversation with your prescriber. Each of these has ended more CPAP careers than all machine defects combined.

Two habits compound faster than anything else. Wear the mask for twenty relaxed minutes before sleep — reading, not trying to sleep — so your nervous system files it under normal. And check your own numbers weekly: modern machines report your AHI and leak rate every morning, and watching your event count drop from 30 to 4 is the kind of evidence that keeps people going through an unglamorous week two.

Call someone when: your residual AHI stays elevated past the first couple of weeks (pressure or leak problem — start with the leak), mornings bring headaches that weren't there before, or you're three weeks in and usage is still sliding rather than climbing. That last one is exactly what your prescriber and our 90-day mask fit exchange exist for — the most common fix for a failing first month is a different mask style, not more willpower.