Gum reshaping, also known as gum contouring or a gum lift, is a cosmetic dental procedure that involves altering the gum line. It is used to correct "gummy smiles," where excessive gum tissue makes teeth look short, or to fix an uneven gum line. The procedure can be performed for aesthetic reasons to create a more balanced and symmetrical smile. In some cases, it may also be done for oral health reasons, such as to treat gum disease or to expose a cavity that is hidden under the gum line.