Septum deviated to right but I feel airflow is restricted in right nostril - what's the reason for this?

There are a lot of things that contribute to your nasal airway and functional nasal airway obstruction. Your septum may have a big C or S shape where it obstructs the left airway further back in the nose (where it's harder to see during examination), before deflecting to the right caudally. You also may have something else obstructing the left airway, like turbinate hypertrophy or bony spurs.

Thank you for your question. Deviated septum is a common problem. It occurs when the septum, the cartilage, and the bone that separates the nasal cavity, are off-center. Therefore, it leans to one side of the nasal cavity. This issue causes breathing problems, headaches, and nasal congestion. A deviated septum can easily be treated with Septoplasty or if you are considering rhinoplasty surgery, your surgeon can also fix the problem during this surgery.
Best wishes.

Hi there! If the septum is deviated to the right, you may be experiencing dynamic valve collapse on the left side. This is when the nostril collapses on inspiration due to the airflow being diverted to this more "open" side and the nasal cartilage not providing enough support to resist. This is a common complaint patients have when this is happening. Hope that explains things!