The most important part of the lip to maintain with aging is the philtrum.
Zoe Diana Draelos, M.D.The most important part of the lip to maintain with aging is the philtrum. The philtrum defines the major architectural interest of the lip and should be in the center of the face and a deep symmetrical “V.” It is important to restore this feature with hyaluronic acid filling. As the lips age, the philtrum becomes flattened and lost giving the female face a more androgenous appearance. Injecting hyaluronic acid with the needle entering at the superior aspect of the philtrum directed inferiorly toward the center of the lip with a nice angle should be the first step in filler lip restoration. This feature can be additionally accentuated by using a lip liner to further define the philtrum. The lip liner will provide definition and prevent the lipstick from bleeding off the vermillion.