lipo permanently removes fat cells. The next time you overeat, the fat has to go somewhere, so it'll go on your thighs. so you have your thigh's lipo'd, and it goes on your chest. you get that done and it goes on your back and on and on it goes until you get fat building up in all kinds of places like your elbows, knees, behind the ears etc.
that's an extreme case obviously, but after lipo, gaining fat or even the prospect of gaining it is a stressful business. what's the point in having a lean belly if you look like the michellin man everywhere else
I'd give low dose DNP a shot. 200mg ED with proper supplementation, adequate water, strict diet & cardio can work wonders when diet & cardio alone has failed. anavar also helped me lose flab around the mid-section. I did an anavar only cycle and got almost visible abs for the first time in my life.
do some serious research on lipo bro. especially the side effect I mentioned. I did have an article about that somewhere, I'll see if I can dig it out. good luck.