Botox Cosmetic is an FDA-approved prescription medicine that is injected directly into muscles and used to improve the look of moderate to severe expression lines. It temporarily blocks nerve impulses to the injected muscles and reduces muscle activity that cause moderate to severe lines.
When complete, even if your mind is telling a muscle to move, whether intentional or not, the muscle will stay still. Certain types of lines and wrinkles on your face, known as dynamic wrinkles, are caused by muscle contractions. These signs of aging develop because the skin is strained as you use certain facial expressions. Over time, your skin will become permanently indented.
Botox injections work by temporarily paralyzing the facial muscles that cause these wrinkles.