Several years ago I had a problem with narrowed sinus and nasal passages. They went in and removed and cauterized some of the turbinates (membrane folds in the nose) plus they did a septoplasty. It did the trick and I was abble to breathe very well afterwards. It isn't always permanent (the septoplasty is though) and they may have to do it again. I need to have it done again because my sinuses get blocked easily. Ask for a referral to an ENT and see what he says.