Septal Devation of 5-6 Mm - Is This Severe?

Kate, septoplasty improves nasal airway by straightening or removing segments of the septum that block nasal air flow. There can be other contributing factors to obstruction. Congestion is a sign of allergies, and you should undergo a full evaluation prior to any surgical intervention. In addition, your nose requires direct examination in order to determine if you have weakness of your nasal sidewall, which is not detectable by CT scanning and can play a significant role in nasal obstruction. Hope this helps,

Grigoriy Mashkevich, MD New York Facial Plastic Surgeon. 

If you have trouble breathing (nasal obstruction) and also have a deviated septum, you will likely improve from a septoplasty.  Occasionally, an inferior turbinate reduction will also be needed. But if there is a fixed physical obstruction in the nose, correcting it should significantly improve your symptoms of nasal obstruction. 

Everyone knows about the "deviated septum", but interestingly it  is not the most important cause of airway obstruction.  This is proven by the many patients whose septa have been fixed but who still have poor airways.

Between 1999 and 2007,  I performed airflow measurements on 600 patients whose airways I corrected.  The biggest improvement came from fixing the internal valves (in the middle of the sides ) and the external valves (at the nostril rims).  Fixing either set of valves doubled airflow.  Fixing both sets (if they weren't functional) tripled or quadrupled flow.

Septoplasty fixed the blocked side but did not significantly increase overall nasal airflow.

Turbinates warm and humidify the air and can also block the breathing; if you do not have allergies they usually enlarge because of the bad airway--not cause it.

See a surgeon who can evaluate and correct whichever problems you have.  Good luck!