Dear Lisaham, In general, fat from anywhere in the body where there is an excess can be harvested relatively atraumatically, processed, prepared and then injected. Fat augmentation to the lips can be quite successful and a relatively small volume in the order of 3-4 syringes is usually deployed. Therefore, if you have enough subcutaneous fat under the chin that can result in 3-4 prepared, purified fat injection syringes then absolutely you can contour your neck and then enhance your lips. If, however, there’s insufficient fat under your chin what fat is there can be harvested and I would generally recommend a harvest technique that is gentle such as ultrasound assisted lipoplasty or Vaser Lipo followed by a thermal stimulation technique such as Smartlipo or BodyTite. This approach will give fat that can be processed and injected that is still viable, but give you the best possible neck contraction and contour. Other areas of your body may need to be accessed such as the inner thigh, outer thigh or abdomen to complete the number of syringes necessary to achieve your lip augmentation goals. It is important to remember that fat grafting results in quite a bit of swelling and edema of the lips resulting from the free fatty acids that are released and that the swelling may last 7-10 days. With newer injectables such as Juvederm Voluma, Juvederm Volbella and even Juvederm Vol Lift, long-term lip augmentation results are greater than one year can be achieved with very little swelling, bruising or recovery needs. Fat transplantation is very desirable and I’ve been performing fat transplantation to the face for 25 years. There is more downtime than off the shelf soft tissue fillers, but you get the added benefit of contouring areas where the fat has been harvested such as your submentum or chin. I would seek the consultation of a plastic surgeon with considerable experience both in lip augmentation using autologous fat and neck contouring. I hope this information has been of some assistance and best of luck. For more information, please review the link below. R. Stephen Mulholland, M.D. Certified Plastic Surgeon Yorkville, Toronto