Botulinum toxin is a nerve conduction blocker, which can block the connection between nerve and muscle. After injection, muscle will relax, so it can be used to treat masseter hyperactivity, modify pie face or fade expression wrinkles, and can also be injected into legs, which can contract leg muscles and have the effect of stovepipe.

Botulinum toxin can play different roles, which requires professional doctors to inject botulinum toxin in different ways.