HI cristiane in cape coral,
There are really just two types of procedures, and you have to know what each can do, and what it can't do:
1) Liposuction - this procedure removes excess fat. The final result depends on what you look like before-hand, the surgery that's done, and the way that your body heals as a result of that surgery. Some techniques of lipo appear to have a somewhat greater ability (there are a few qualifiers there!) to help the skin contract down than others, but many excellent results including some degree of skin tightening have been achieved with all forms of lipo.
2) Skin Removal - there is a limit to the amount of skin tightening you can reasonably expect with lipo alone. If you ALREADY have hanging skin then you're asking a lot of the lipo. Of course, it's fine to do lipo now with the understanding that, if you're not happy or your skin does not contract adequately, you'll always have the option to remove skin at a future procedure.
It's often a question of degree: the more hanging skin (versus excess fat) that you have pre-operatively, the less you can fairly expect lipo alone to give you a tightened and smooth contour.
No absolute answers, but that would be my general advice.
I hope that this helps, and good luck,
Dr. E