Can I use CoolSculpting for a smaller waist?

coolsculpting probably would not be effective.  even if you have enough loose skin and fat to be sucked into the applicator.  I think laser assisted liposuction using the skin tightening componant to attempt to deepen the waist could give you some limited improvement.  the laser system I use can have the fat destruction wavelength turned off ( 924nm) and the skin tightening mode turned on (975nm).  this can be done with out extracting any fat if there is not enough fat to remove, although some fat will be destoyed by the heat of the 975 nm wavelength.