Dynamic wrinkles, or expression lines, are deep grooves in the skin that form over time as we perform the same actions repeatedly. Repetitive muscle movements, like smiling, frowning, squinting, or scowling, create dynamic wrinkles. These expression lines become more prominent in your 30s and worsen with age.
Botox is a neuromodulator derived from Botulinum Toxin Type A. Botox temporarily blocks the signals responsible for causing the muscles to contract (tighten.) This allows the muscles to relax and lengthen. In addition, the elongated muscles make it possible for the overlying skin to smooth out and lay flat, reducing prominent wrinkling.