I had this problem and had a constantly blocked nose all through childhood. I had an operation to cut away part of my septum which was leaning too far in one direction. I had a splint in my nose for a few weeks. When it was removed, I could BREATHE for the first time EVER. It was amazing. HOWEVER, afer a couple of days it started to go back to the way it was before. The problem was not my septum, but my allergic nature- asthma/eczema/a constantly irritated nose lining. So, I did a detox and gave up dairy for several weeks. Within a few days EVERYTHING from my nose and head (!) came out. It was like the worst flu and cold ever. After a few days I felt amazing. I could breathe through my nose and have been fine ever since- that was about 6 years ago. My blocked nose was caused by an intolerance to dairy. By dealing with the underlying cause of the irritated skin my nose, I sorted the problem. It's a shame that I had to go through the surgery unnecessarily. (p.s- a few weeks after the surgery I had the worst nose bleed ever. I was taken into hospital and had to have my nose lining cauterised while I sat and watched. The doctor said "Can you smell that? That's YOU burning".