I've been a "mouthbreather" for most of my life due to allergies, slightly bent and permanently blocked nose - I basically was not able to breathe freely through my nose, so I used mouth instead.
Recently I read an article about "correct breathing", and it can be summarized as "just use the f*!#&%g nose!".
After 30 minutes of forcing myself to not open my mouth and forcing air through tiny opening in my nose, the airways opened up and I've been nose breathing since. Oh the years wasted...
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