Thank you for your question Louise. It is a common misconception that nonsurgical (Kybella, CoolSculpt) and surgical (liposuction) fat reduction procedures result in increased accumulation of fat in areas other than those treated. All of these procedures, including Kybella injections, reduce areas of fatty prominence and reduce the number of fat cells in the targeted area, thereby making those areas more resistant to reaccumulation of fat. This is exactly the effect that we would hope for since treatment areas are usually those that tend to accumulate more fat or are difficult to reduce with diet and exercise. These procedures do not however redirect fat and cause it to accumulate in larger amounts in other non-treated areas. Kybella treatments of your neck would not cause you to accumulate fat in your abdominal region. If you were to have weight gain after Kybella treatments however, you should accumulate more fat in your abdominal region as always, but you may accumulate fat in your neck region to a lesser extent. Stay ageless.Max Polo, MD