A neck lift involves tightening the neck muscles and skin of the neck to create a more youthful-looking neck, chin, and jawline. The results of a neck lift are not permanent, but it should last for many years, even though the aging process continues. The best candidates for a neck lift are those who suffer from a sagging or folding neck. Loose skin and sagging muscle tissue usually occurs as a result of the aging process or sometimes after substantial weight loss.