Congratulations on your weight loss – it's a real accomplishment. Unfortunately, as we age, losing significant amounts of fat often leaves us with sagging skin. Sagging in the neck, commonly referred to as a turkey neck, can be very aging as the skin there is thin and does not adhere well to the underlying muscle. The best remedy for a sagging neck is a neck lift with platysmaplasty. This dual procedure tightens the platysma muscle, plus tightens and removes excess skin. This will give you a dramatic rejuvenation that can last 10 years or more. The sagging on your neck will be resolved and you'll have a cleaner jawline. From your photograph, you might also benefit from a lower face lift to resolve some jowling. I hope this helps.