Why can't Kybella be used wider out on the neck? Why can it only be used right under the chin?

Kybella can be used on the neck and jawline if there is fat. I suggest you see an expert though for the best outcomes as it is currently only approved for under the chin other areas are off label. Best,  Dr. Emer.

Kybella dissolves and kills fat cells but it also creates large amounts of inflammation. That inflammation can injure nerves that move the lower face. There is a safe area where Kybella can be placed in the middle of the chin fat pad but as you move to the outer areas beneath the jaw the risk of injuring nerves and blood vessels rises. Kybella is a safe product but please consult with an experienced physician injector that understands the product's risks. I hope this information is helpful for you.Stephen Weber MD, FACSDenver Facial Plastic Surgeon