Nasolabial folds are commonly known as Smile Lines or laugh lines. They are the lines that run from the side of your nose to the corner of your mouth. They are a normal part of our face, with even children having nasolabial folds that deepen as they smile. However, as we age, nasolabial folds permanently deepen due to weakening of soft tissue that usually acts like a scaffold to support the structure of the face. An increase in fat to the outside of the line, together with the repetition of facial expressions over time aggravate the appearance. This results in a tired aged appearance. Nasolabial folds become saggy, fall forward, and wrinkles develop in the folds.