While botulinum toxin is often used for handling wrinkles, it can also be used for the jawline and neck. It relaxes the muscles that cause the skin to sag and pull downward. As a result, your jawline and neck will start to look younger and more defined.
 
Botulinum toxin especially works quickly to provide you with results. You should see noticeable results in about 1-2 weeks after the treatment is complete.