Botulinum toxin functions by temporarily interrupting the nerve signals responsible for muscle contractions. It is frequently applied to relax targeted muscles beneath the skin, which helps to smooth facial wrinkles, improve facial symmetry, and reduce the size of larger muscles like the masseters. Beyond cosmetic uses, it also addresses various medical conditions such as treating hyperhydrosis (excessive sweating). Having been used in medical treatments for more than 40 years, botulinum toxin was first approved by the FDA for wrinkle treatment in 1989 and has since become one of the most sought-after cosmetic procedures worldwide.