Why do lips become thinner?
Some people have naturally thinner lips than others. Thinning of your lips is often one of the first signs of ageing, usually noticed in your late 20s or early 30s.
Lips get their shape and plumpness from collagen and naturally occurring moisture. As we age, our collagen production decreases, leading to a loss of volume in our lips. This can be accelerated by many lifestyle factors, including smoking, sun exposure and dehydration.