If i chew extremely hard along with my tongue plus jutting my lower jaw foward i can breath MUCH better and more clear through both nostrils
This effect lasts 1-3 minutes, after that one of my nostrils automatically becomes blocked again
Why are your nostrils blocked in the first place?
Get a CBCT. Where are you?
I tried sliding my lower jaw forward ever so slightly (not ahead of my upper teeth or anywhere close, it was like 2mm) and a few hours later, long after I stopped doing it, the side of my jaw made the loudest cracking noise I've ever heard. If it wasn't painless, I would've thought my jaw broke from how loud it was. Not doing that again.