ThermiTight, as done in my NYC practice, helps tighten and lift facial (and other body areas) sagging. However, swelling certainly does occur and varies from patient to patient depending on many factors such as the amount of time and heat needed to create the desired effect. Some patients have more sagging than others or more fat in the neck that requires more energy and they would get more swelling. For some the swelling is not much and is gone in a few days, while others look very swollen and even bruised for as much as two weeks but the average is one week. For those patients who need just a little boost, they may expect less swelling than those patients who would do far better to have a face and neck lift but refuse to undergo surgery and want to try ThermiTight to help tighten their face as much as possible.