Nasal obstructions and valve collapses
Nasal obstruction can be due to valve collapse, narrowing of the airway when the bones are fractured, residual deviated septum or big turbinates. A good examination by your surgeon should help with this.
If you have a nasal valve collapse, you need to have that exact region built up with cartilage (septum, ear or rib). A good way to diagnose this is to place the hard part of the Q-tip in the airway and elevate the nasal valve and see if your breathing improves. Please note, your doctor should do this. You may also need to have your turbinates reduced.