Botulinum toxin has been used in medical treatments for over 4 decades and was first approved by the Food and Drug Administration (FDA) for the treatment of wrinkles in 1989. It is now one of the most popular cosmetic treatments in the world. It works by temporarily blocking the connection between nerves and muscles, thereby enabling muscles to stay relaxed. A safe and effective treatment to reduce the appearance of a gummy smile is the injection of botulinum toxin into the Mentalis muscle. Botulinum toxin is used to relax the Mentalis muscle, reducing the over-activity of the muscle with facial expressions, speaking or chewing. This treatment does not affect normal expression, speech or eating.