Why Do I Look Bigger Later in the Day (Smart Lipo)?

Hi, I had smart lipo about 4 weeks ago on my abs and flanks and I am really excited to see my results. When I first wake up in the morning, my stomach area looks amazing. It's perfectly fat and I can tell a big difference. However, as I go on with my day (I have a desk job), I noticed that my stomach gets bigger and starts looking back to the way it was (lumpy and fatty). Is this normal and if so is the permanent?

