Botox is designed to treat dynamic wrinkles caused by muscle contractions, such as smile lines and expression lines. It can be used to treat frown lines between the eyebrows, forehead wrinkles, and crow's feet (wrinkles at the corners of the eyes). Botox helps relax facial tension and smooth out dynamic wrinkles and expression lines by relaxing the muscles. The substance is injected into the appropriate muscle, preventing nerve signals from reaching it, thereby preventing muscle contraction and, consequently, the wrinkles.