Shortening Nose Length During Rhinoplasty

A long nose is usually caused by a long nasal septum which defines the the bridge to nasal tip dimension, as well as the length and size of the tip cartilages called the lower lateral cartilages. Sometimes one or the other or both is the problem.
To shorten the nasal septum an internal nasal incision is made along the edge of the nasal septum where it can be shortened by removing some of this cartilage. There are a variety of maneuvers to change the length of the nasal tip cartilages; one commonly performed is removing a section of the nasal tip cartilages and overlapping the cartilage and suturing it back together. This is called a lower lateral cartilage overlay.
These are two common examples but there are many other maneuvers. These can be performed in both closed and open rhinoplasty. I prefer a closed approach when possible.

The usual way this is done is by removing part of the septum and trimming the cartilages of the tip. You should see an experienced rhinoplasty surgeon and discuss with him what are the goals you would like to accomplish. See live patients where he has done this.