A double chin occurs when your jaw (mandible) is relatively weak compared to the amount of soft tissue under your neck. And a double chin never looks good, you won't see many leading male or female actors with double chins.
Depending on the severity of your problem you may benefit from surgical or non-surgical chin augmentation, to strengthen you jawline. If you have a chin implant surgery, the same incision may be used to remove any extra fat under the neck. In severe cases, loose skin may need to be tightened. This requires a neck lift procedure. Strengthening the jawline is often more important in reducing a double chin that removing fat under the neck.
In summary, double chins can be best treated by making your jaw stronger and/or removing and extra fat or hanging skin.
Feel free to click on the link below to review before and after photos of my patients who have received a Chin Augmentation with Liposuction.