apparently you haven't done too much successful dieting if this is the first time you are experiencing that.
It has always happened with me though the other diets, WW and a self-made up one, resulted in quicker weight loss................followed by weight gain.
With Atkins, which I have been on since April, the fat loosened up fairly quickly and when added to loose skin, has made a bowlful of jelly beans. It used to be a bowlful of solid lard.
It's a nice change though I'm hoping my 7-day-a-week trips to Gold's Gym will eventually pay off and tighten up some of the mess that is starting to surround me. (It may be a mess, but at least it is a lot smaller mess!!!!!!!!).