Of course. They do have to wait two months. Then they might require another treatment which would require another two months for the dead cells to be excreted. Some people might even require a third treatment. You will know if it worked because it merely freezes fat so you would have more loose skin. Which is one of my many problems with the procedure. If you melt fat the sude effect is smoother tighter skin. There are more than a dozen radio frequency devices that can melt fat in mere weeks. Exilis and Vanquish are two of my favorites. It works but its slower leaves loose skin requires another treatment to tighten skin and has three potential adverse events that would require surgery which is why we dont offer it even though we could make a fortune given its hundred million dollar advertising budget. We get many patients who come to us for treatment after coolsculpting. Some do report that they didnt get any results others got results but need us to help with the loose skin. Either way you would know, after a few months.