Hollow temples occur when fat loss, collagen depletion, and bone resorption create a sunken or concave appearance on the sides of the forehead. This can contribute to an aged, gaunt, or skeletal look, making the cheeks and brows appear less lifted. While this is a natural part of aging, factors such as genetics, weight loss, and environmental damage can accelerate the process. Fortunately, dermal fillers and biostimulators can restore lost volume, creating a more youthful, well-balanced appearance.