What Are Thin Lips?
Lips can appear thin due to natural aging, genetics, or both. As we age, several key components that contribute to lip fullness begin to decline. Collagen, which provides structure and support, decreases significantly — studies show we lose about 1% of collagen per year after age 20 and elastin fibers, the substance responsible for skin’s ability to bounce back, also diminish over time. In addition, hyaluronic acid, a molecule that helps lips retain moisture and volume, becomes less abundant.
Genetic factors influence not only the natural shape and volume of your lips but also how quickly they show signs of aging. Some people are also born with naturally thinner lips or asymmetry that they wish to address through professional treatment. This combination of inherited traits and natural aging processes drives many people to seek medical intervention.