Liposuction can reduce jowls and re-contour the neck by removing excess fat. The overall effect is one of rejuvenation and weight-loss. The incisions required are only millimeters in length and can be nearly invisible when healed. I often use ultrasound assisted liposuction, as it allows me to provide a more uniform and thorough removal of fat through areas that are often difficult to pass a traditional liposuction cannula through easily. 

In order to be a candidate for liposuction of the face and neck without the need for skin removal at the same time, you have to have good elasticity in your skin so that it will shrink down to the new neck contour without sagging.  Some individuals are fortunate in that they meet this criteria, but most do require removal of skin and therefore longer incisions.

It is better to perform the liposuction and remove the extra skin at the same time than to obtain a result that includes sagging skin, which must then be taken out in a separate surgical procedure.