I have been struggling with bad sleep for about 10 years, and get about 4 hours of sleep on CPAP each night. I always wake up with a terrible dry mouth because I can't breathe through my nose. And I can't take naps, no matter how exhausted I am, probably because my body aches so badly from sleep dept. So, I'm a hurting unit.
After going to doctors off and on for years, I finally had one order a CT scan of the sinus area to find out why I can't breathe through the nose. It showed a deviated septum. I went to an ENT and he put a scope up the nose and could not get it past the septum on the right side. He reviewed the CT scan with me in detail and showed me the problems. Some of them are obvious even to a layman.
In the CT scans you can see the deviated septum (which collapses when I try to breathe though that side) and the cocha bullosa (a hollow turbinate).

