>What has made a major impact was seeing an ENT [...] Turns out “negative pressure” is a major cause of airway collapse. The cause of snoring & apnea, from my

>What has made a major impact was seeing an ENT [...] Turns out “negative pressure” is a major cause of airway collapse. The cause of snoring & apnea, from my own searching online and seeing various anecdata, is that there are several common causes but it can vary wildly. I've also tried many similar treatments to yours, short of CPAP, and including trying tongue & jaw exercises and mewing to try and get my default sleeping jaw & tongue position to be the same as when I'm awake (never had success after months). I had my deviated septum corrected and a turbinectomy alongside it, and it made absolutely no difference to my snoring (but I do breathe better in more humid climates now). The only other main factor I've noticed is weight, or rather visceral fat. Being overweight often comes with lots of visceral fat, and this includes near the airways, thus constricting the space your airways have to operate with. Perhaps that contributes to this whole negative pressure thing. A side benefit of having your partner sleep separately is that there is far less sleep disturbance, even the kinds you wouldn't notice. My sleep quality has gone up.