Which body parts start stretching first as we age?

For many people, the earliest visible changes show up on the face. As collagen and elastin break down, skin becomes thinner and less elastic, so fine lines form around the eyes, forehead–and mouth. The delicate skin of the eyelids stretches-and the muscles that hold them up weaken, which can lead to drooping lids or puffiness that makes the eyes look more tired. Dermatology sources often note that constant sun exposure speeds this process, which is why daily sunscreen-and gentle care matter so much.