Could a deviated septum change the nostril that it blocks breathing through?

Yes: Septal deviations occurring along the most anterior or projecting edge known as the caudal septum can distort the nostril. In addition a septL deviation can produce secondary changes such as valve collapse resulting in a pinched nostril shape. Seek an ent surgeon or facial plastic surgeon to examine completely.

Deviated septum: A deviated septum may cause asymmetry of the nostrils. It can also cause symptoms of nasal obstruction. Have your nose evaluated by a board certified otolaryngologist,