No. Deviated septi are either hereditary or the result of a sharp impact on it at one time or another.
A deviated septum may also contribute to snoring, sleep apnea, and other breathing disorders
Yes, my rectum is itchy after the anal probing.
The vomer forms the nasal septum. Go to the link and click on the skull.
This can be the result of Crohn's disease but it occurs very rarely.