Patients arrive with a vocabulary for this one. The waddle. The gobbler. The wattle. Whatever you call it, the complaint is consistent: the line from chin to neck has gone soft, and no amount of posture or weight loss brings it back.
It is worth knowing what has actually changed, because it determines whether the operation you are being offered will work.
It is rarely the skin
The platysma is a broad sheet of muscle running from the collarbone up over the jaw. It is what gives a young neck its clean angle. Over time its front edges separate and its support loosens, and the sheet stops holding the shape underneath.
Fat is the other half of it, sitting both above and below that muscle. Those two compartments behave differently, and removing only the superficial layer can leave most of the fullness in place.
Skin is the last layer, not the first. A procedure that tightens skin over an unaddressed platysma changes the surface for a while and then relaxes, because the structure underneath is unchanged.
The chin nobody mentions
Some people unhappy with their neck have an anatomically normal neck and a chin that projects less than average. A chin sitting back shortens the distance from jaw to neck, and short reads as full, regardless of how much fat is actually there.
This is the kind of thing an assessment should catch before anybody operates. It changes the recommendation entirely.
What to ask
If you are being offered a neck procedure, ask which layer is being treated and why. Ask whether the platysma is being addressed directly. Ask whether your chin projection has been assessed.
The answers will tell you a great deal about whether the result is likely to last.