The tear trough is the area between the cheek and the lower eyelid. In most individuals, tear troughs are an inherited trait. However, as you get older and your facial tissues lose volume, they become more prominent. As we age, our face loses volume and its natural concentration of hyaluronic acid. This can cause physical hollows beneath the eyes that create shadows on the face, contributing towards a tired-looking appearance, along with dark circles and eye bags.