I’m glad you had polysomnography done, and are now using CPAP. It’s too bad that poor air quality in your area has interfered with your use of the device. In my experience, nasal congestion problems are also associated with poor mask fit causing pressure on nasal cartilage, inappropriately high air pressure, and an imbalance between room air temperature, tube heating, and humidification. Head position also has a degree of influence, because of body fluid shift causing swelling in nasal passages. It’s a continual juggling act for me to get a few decent snatches of sleep at night between episodes of severe chronic pain.

There are so many of us blogging about these interrelated health problems, we would make a statistically significant sample for a research study. (If ever you’re feeling up to it, I have several blog sites, and the one that deals with some specifics of my health issues is at https://butterflybefree.wordpress.com)

I understand what you’re going through, so I don’t expect a reply to this comment. I just wanted to express my empathy and contribute to the reassurance that you are not alone.