Hanging Columella on Just One Nostril, What Can Cause This?

Photos would really be necessary to provide you with the best advice. The appearance of asymmetry can be due to the following:

1) Receding nostril on one side
2) Asymmetric tip cartilage
3) Septal deviation

An exam would be necessary to tell for sure, and this would be the next step. There are likely treatment options available, but a revision procedure would be necessary to improve the issue. Your nostril can be lowered if necessary using cartilage grafts if that is the cause. A residual deviated septum can be repaired, and your tip cartilages can be improved as well. Seek the advice of a board certified facial plastic surgeon with great credentials and fellowship training. I hope this helps, and I wish you the best of luck.

The asymmetric columella can occur for a variety of reasons which include-  post-op undesirable result due to less than ideal surgical technique, associated with a septum on its bottom that is deviated towards that side of the nose where the columella is lower, and sometimes it just is a genetic feature or something associated with some trauma.  This can be corrected with proper surgical steps.

You may have a deviated septum under the hanging side of the columella causing the asymmetry.

Another possibility is that your have nostril margin retraction on one side allow more nostril to be seen.

It's hard to saw what is going on in your case with out seeing your nose.

Check out my web reference below to read more about hanging columella repair.