Hi Inq, I have vasomotor rhinitis and had surgery for it since medications fail to work for me.
The lining inside the affected nose overreacts to anything that irritates it. Therefore, the blood vessels enlarge and this causes chronic swelling and nasal obstruction. There are cases where the imbalance of the nerve supply leads to the dilation of the blood vessels...
Things like air pollution, temperature, hair sprays, weather changes can aggravate vasomotor rhinitis. I heard that it ain't easy to diagnose vasomotor rhinitis as unlike allergic rhinitis where there's a blood test or allergy test. I react badly to cold temperatures!
I guess it would be for the doctor and his own expertise to tell you if you have vasomotor rhinitis. I was told that I had allergic rhinitis at first. All the best for your sinus surgery!