No matter what good genes you've been blessed with, when it comes to our lips, two things are certain: they will get thinner, and they will get lip lines.
As we age, the skin of our lips thins, and the fat beneath the skin decreases in volume, producing thinner lips. In addition, the movement of the circular muscle that frames the mouth produces radial lines that emanate from the lip much like the spokes on a bicycle wheel. These lip lines are often referred to as lipstick lines, smokers lines, or vertical lines. The corners of our mouth will also tend to deepen an