Botox, short for botulinum toxin, is a popular treatment used to smooth out dynamic wrinkles, which are caused by repeated facial expressions such as frowning, smiling, or squinting. It is injected into specific facial muscles, temporarily paralyzing them and preventing them from contracting. This results in a smoother, more youthful appearance as the skin relaxes and wrinkles soften. Botox is commonly used on the forehead, between the eyebrows (frown lines), and around the eyes (crow’s feet).