Before learning how neuromodulators work, it may be helpful to first understand something called dynamic wrinkles. Unlike wrinkles found on the surface of the skin, dynamic wrinkles are formed by deep, underlying facial muscles. When you make certain repetitive facial muscle movements, these wrinkles can form and deepen over time, giving away your age.
Neuromodulators help banish dynamic wrinkles by means of an injection that contains a safe type of toxin. This blocks nerve transmissions from the brain to the targeted muscle, preventing it from forming a contraction and dynamic wrinkle in that area.