When there is only minimal fat and loose skin on the neck, below the chin, using standard liposuction techniques can cause contour deformities and loose skin after the fat has been removed.
There is also risk of contour deformities using the open technique with direct excision of fat under direct vision, plus the incision required is much larger than the tiny puncture wound used with Laser liposuction.
In my experience, the new Laser Assisted Liposuction using the SlimLipo technique has produced excellent fat removal and skin tightening in young people who have only minimal fat and or loose skin.
The instrumentaion required with SlimLipo is very tiny because the fat is liquefied before removal thus only small cannulas are needed to remove it. In addition, the laser heat generated skin tightening is a significant advantage in my opinion.
Results have been excellent (see photos in link below.)