Wrinkles occur when you smile, laugh, squint, frown, or use expressions that work your facial muscles. However, the overuse of these facial muscles makes them appear prominently on your skin even when you’re not actively using them. That’s how you get deep facial wrinkles, such as the forehead lines, frown lines between your eyebrows, and laugh lines around your eyes.

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Botox belongs to a class of cosmetic injectables that temporarily relax the facial muscles responsible for these wrinkles. It’s composed of a neurotoxin protein called botulinum toxin that blocks communications between muscles and the nerve roots that carry messages to the brain. When strategically injected into the facial muscles responsible for your wrinkles, Botox relaxes your muscles and smoothes your skin.