Smile Lines Filler: Read the Pros and Cons, Dos and Don’ts for Aftercare and More Many people turn to fillers to reduce smile lines and achieve a smoother, more youthful appearance. Smile lines, also known as laugh lines or nasolabial folds, are the natural creases that form between the nose and mouth, often deepening with age. While they can add character to a face, some prefer a softer look. With the rise in popularity of smile line fillers and other injectable treatments, finding a solution t