Fine lines and wrinkles are visible signs of aging caused by the natural loss of collagen and elastin in the skin. Fine lines often appear first as shallow creases around the eyes, mouth, and forehead, while wrinkles are deeper folds that develop over time. These changes are part of the aging process but can be influenced by external factors such as sun exposure and lifestyle habits. With targeted treatments, the appearance of fine lines and wrinkles can be softened, restoring a youthful, smooth complexion.