Facial volume loss, sometimes referred to as age-related volume loss, can happen for a number of reasons. One contributor is the gradual reduction of collagen, elastin, and hyaluronic acid in the skin over time. These components play an important role in the skin's firmness, elasticity, and hydration, and as they diminish, the skin can lose some of its structural support. Another factor is the natural shifting of fat pads beneath the skin. Over time, these fat compartments may move or reduce, which can lead to hollow areas, particularly around the cheeks, temples, and under-eye region.