Round Waist 2 Years Post- Tummy Tuck - Why?

Your situation is rather common.

The IDEAL hourglass figure has a Waist to Hip ratio of 0.7. During your tummy tuck the waist was narrowed thereby reducing the numerator of this relation. If no liposuction of the hips is done at the same time, the denominator (Hip width) stays the same but appears larger. Any weight gain will be highly visible in the hips which is exactly what your photographs display (with the underwear falling into the depression below the hip fat prominence). To improve this appearance, you need to lose the weight or have liposuction.

Dr. Peter Aldea

Ashli,

It is highly likely that your 2kg weight gain has gone straight to your waistline.  Two kgs is a fairly significant amount of weight as a percentage of your body weight, which looks to be low in the photo.  Try dieting off the 2kg and see what happens.  If that doesn't do it, then go back to your surgeon for an evaluation.  Good luck!