I am not making a recommendation here - only saying that, 25 years ago, it worked for me. The ENT counted 22 sinus/ear/throat infections in 2 years in my 40's and said "let's take a closer look." After scoping, he resorted to surgery and removed scar tissue, polyps, cleared out pockets of infection & straightened my septum (broken in a teenage water fight that involved metal buckets.) Once all was healed I could breathe normally through my nose for the first time in my life - I had my first recognized sinus infection at age 10.
Probably my bronchiectasis began to develop way back then from repeated bouts of bronchitis brought on by sinus infection drainage.
Sue