Botox can be used on a saggy neck. An injection of Botox into the neck paralyzes neck muscles and serves to reduce fine lines and wrinkles but it can also be used to target sagging jowls. Clients may see improvements in both the jawline and the neck itself with Botox.   Botox can change the shape of the jaw and the neck by tightening the skin around to produce a slimming effect with a noticeable reduction in sagging skin. Botox is a non-surgical practice which means it has no necessary hospital stay or long recovery times like alternative procedures. The results produced by Botox are also long-lasting and easily maintainable.