Drooping nasal tip is a term used to describe downward movement of the nasal tip with smiling. More severe forms of this include shortening of the upper lip with the appearance of a horizontal crease and elevation of the outer lower edge of the nostril in the same motion.
Drooping Nasal Tip With Upper Lip Shortening and Horizontal Crease on Smiling
This appearance is created by the actions of the levator labii superioris alaeque nasi and depressor septi nasi muscles.
The commonly performed trimming of the tip cartilage also helps to rotate the tip upward.