Can an Injury Cause a Dorsal Hump to Form on the Nose?

You may have broken your nose at the time of one of your injuries.  This will have caused the bones or the cartilages in your nose to become deviated and one may have outwardly protruded giving you this subtle hump on your dorsum.  A proper physical examination will help determine if a deviation has occurred.

You are correct. The injuries to your nasal bridge are the cause of the problem. The breathing issues are also related to the trauma but may have an underlying allergic cause with the turbinate enlargement. Surgical correction would be helpful for your appearance and function too. Best, Dr. G.