Dysport is injected directly into the muscles that cause facial wrinkles, temporarily immobilizing them. It specifically targets the glabellar muscles — the ones that form creases on your forehead when you frown.
Dysport diffuses a bit farther from the injection point than Botox: one to three centimeters compared to Botox’s one centimeter. This means that fewer injections are needed, but it also means that the health professional doing the injections must be very skilled to ensure that the drug does not spread to nearby muscles and cause eyelid and/or eyebrow drooping or other unwanted side effects.