During your early 20s, the skin is supple, toned, and radiant. The fat under your skin (called subcutaneous fat) and other soft tissues are evenly distributed across the face and help give the forehead, temples, cheeks, and chin, a well-projected youthful look. During the late 20s and mid-30s, early signs of aging such as fine lines and skin textural changes begin to appear, especially around the eyes. The skin loses some of its elasticity and there is decreased collagen production and skin cell turnover. Dark circles may appear under the eyes due to pigmentation or other soft tissue changes.