When I was teenager, during some play I got my nose hit. At the beginning I didn't notice anything special - my nose had been usually blocked due to allergy so I was mouth breathing anyway. After couple of years I got signals that I'm terribly snoring and it occurred that my nasal septum is broken and my soft palate is too loose which are the reason of snoring. I had my surgery done but it failed - my nose was still completely blocked (I wasn't able to take 1 full breath) and I was still snoring. So that was many (15?) years ago.

Until 3 years ago it was getting worse. I was easily getting cold and other infections, snoring (which caused not sleeping well), cough. Until one day when I got constant cough that each repetition was literally making my head to explode. It was Saturday so I get to emergency when I got some strong drugs (something based on morphine) to stop that horrible cough. Then I decided that I had to do everything what was possible to do.

So I went to otolaryngologist who detected 3 problems: 1) completely destroyed tonsils causing ease of catching infections (and some "cosmetic" discomforts); 2) broken nasal septum which were blocking nose; 3) loose soft palate causing snoring. Tonsils were in bad shape so they were only to be removed. So the doctor fixed all the 3 points.

So what changed since then: - no snoring at all - even if want to simulate it my throat does not allow me to. Its shape really changed. Before it was like top left, now it's top right at the picture: https://en.wikipedia.org/wiki/Sleep_apnea#/media/File:UPPP._... - no infections at all (literally nothing!) - I am able to breath by nose as long as I want to, even during moderate effort (eg. during going by bicycle) - I started to have dreams. It seems that due to snoring and vibrations made by that I wasn't getting REM phase - no more every morning headaches - more energy

But: I keep forgetting to breath by nose. That's something I've been working on and it's getting better. My wife claims that I'm still snoring but on the video she took I can hear that it's sound like normal person make when has running nose. And I still have my allergy which every so often makes me sneeze and blocks my nose. So I get up morning with dry, open mouth and blocked nose (by allergy).

Until yesterday - when I was lying on my back in bed (barely sleeping) I felt that my mouth was closed all the time and the liquid made by allergy was going to throat.

So besides all the things I've read about sleeping on back - spine, muscles etc. I hope it would help me with my nose breathing too.