Throat Irritation from CPAP

by Steve

I have had my cpap for almost a year and have had to stop using it several times due to a very irritated throat.

Is there anything that can be done about this problem? I use distilled water in my machine and set the level at 1.0


Throat irritation or sore throat is one of the most common CPAP side effects. Almost every sleep apnea patient with CPAP has throat irritation.

You didn't tell me what type of mask you have, so I will speak generally.

This problem is usually caused by "mouth leak" - If your mouth opens during sleep, much of the pressurized air going into the nose goes comes straight out again through the mouth.

So, if you are a mouth breather, this could be a problem. However, if you use a chin strap with your mask to keep your mouth closed while you sleep, you shouldn't feel the sore throat again.

Another solution is to use heated humidifier that fits your CPAP unit to moisten and warm the air blowing into your throat.

So, check if your humidifier can utilize heat to create moisture. The heat allows the air to hold more moisture and thus carries more effectively humidified air to airways.

Another tip is to fill the humidifier with crushed ice and just use it as a passive blow through and get cooler air that way. Some patients had success with this trick.

Many germs can take up residence in CPAP tubing, so your throat irritation can be a side effect from a virus. Did you go to your doctor to speak about this?

Anyway, you should clean every week your CPAP tubing, to prevent the germs entering your body and cause infections.

I hope it helps. Don't be afraid to comment back.

Remy Thierry
Founder of Sleep Apnea Guide

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Aug 22, 2011
Remy Is Right
by: Angus

Sore throat is a very difficult thing to pinpoint but sleeping with your mouth closed is critical. If you have a bed mate, do they notice that you are leaking air through your mouth? (Of course since you are not snoring, they may be sleeping through your mouth leaks).

Also, many Doctors initially only prescribe passive unheated humidity. Heated humidity using only distilled water (sorry, the stuff out of the tap is filled with minerals that will ruin your humidifier and start growth to add to your sore throat).

Try what Remy has said and my tips and you will overcome the dry mouth, sore throat.

Good sleeping


Apr 10, 2018
Heated Humidifier Problem?
by: Female 1

My cpap has a heated humidifier. I add water every night up to the top water line. For some reason, during the night I wake up feeling I can't breathe & end up removing my mask & turning off my cpap machine. I then try to sleep without it (not very effectively).

In the morning, water in the machine is always used up to the lower water line and never below that line. I use a Resmed Air Sense 10. Has anyone experienced this problem? The part of the water chamber that reaches the water does not reach the second water line. Does this eliminate the humidity?

Sep 17, 2018
Dry irritated throat
by: Anonymous

When I use the full face mask (which I hate) with chin strap I still have a dry irritated throat. Humidity up all the way to 8 and temp at 81. I much prefer the nasal pillow with chin strap but air stil pops bubbles out of my mouth. Ready to give up.

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