The muscles of facial expression are connected to the skin overlying them. After years of use, the muscles create visible lines and creases. By paralysing the superficial muscles attached to the skin, wrinkles “relax” and soften. When the muscles are paralysed, the creation of more wrinkles is prevented. The overall effect is a smoother, more serene, more youthful appearance. It’s like having a “brow lift” without invasive surgery.