Comfort and side effects
CPAP Headaches: Causes and Fixes
Morning headaches on CPAP are often caused by tight straps, sinus irritation from cold dry air, or congestion. Loosening the headgear and improving humidification fix many cases, but headaches that continue need a doctor's review.
Signs
- Headache on waking
- Pressure across the forehead or sinuses
- Soreness where straps sit
- Headache with a stuffy nose
Common causes
- Tight headgear
- Straps that are too tight press on your head and face. ResMed warns against overtightening a mask to stop leaks.
- Cold, dry air
- ResMed explains cold dry air makes your nose work harder, which can cause sinus headaches and irritation.
- Low humidification
- ResMed says humidifiers help prevent sinus-type headaches.
- Therapy not fully working
- If your app shows a high leak or a rising AHI, your apnea may not be fully controlled. ResMed notes mask leak, alcohol and medicines can all push AHI up.
Fixes to try, easiest first
Loosen your straps
Loosen your headgear until the mask just seals. Strap covers can spread the pressure.
Add humidity and heated tubing
Warm, moist air is gentler on the sinuses. Raise humidity one step and add heated tubing if your room is cold.
Treat congestion
Saline spray and humidity can ease sinus pressure.
Check your data
Look at your AHI and leak in your app. High numbers may mean therapy is not controlling your apnea.
Drink water and limit evening alcohol
Dehydration and alcohol both affect sleep. NHLBI recommends limiting alcohol.
See your doctor with your clinician
If headaches continue after these changes, ask your doctor to look at your settings and other causes.
See your doctor for headaches that continue more than a couple of weeks on CPAP. Get emergency care for a sudden, severe headache, a headache with confusion, weakness, vision changes or a stiff neck.
Supplies that can help
Soft fabric sleeves that wrap mask headgear straps to stop red lines, rubbing and hair tangles.
Tubing with a built-in heating wire that keeps humidified air warm all the way to the mask, which is the main fix for rainout (water droplets …
Salt water spray that moistens and clears the nose, a simple aid for the congestion and dryness some people get on CPAP.
Distilled water is what most CPAP humidifier chambers are meant to be filled with, because it leaves little or no mineral scale behind.
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Mask types this applies to
Frequently asked questions
Why do I wake up with a headache after using CPAP?
Common reasons are tight straps, dry air irritating your sinuses and congestion. Loosen the straps and add humidity first.
Can CPAP pressure cause headaches?
Some people get sinus pain with pressure, especially when congested. Do not change your pressure. Tell your clinician so they can review your settings.
Should I worry if CPAP headaches keep coming back?
Headaches that keep coming back after you have loosened the straps and fixed humidity deserve a doctor visit. Bring a week of your AHI and leak numbers so your doctor can see whether therapy is working.
Sources
Last reviewed October 11, 2026. How we research · Report an error