Is indent in side nose repairable? Can a piece of broken cartilage come out decades after an injury?

Had nose trauma when young and always had trouble breathing through one nostril, 30 yrs later I blew my nose and noticed something white and hard with no blood. now I have clear breathing through that nostril but also have an indent. there is no pain and bone feels fine, is this repairable and are there other concerns to be aware of. thank you in advance