Spot fat loss does . Not occur naturally. By losing weight in general a certain amt will probably be abd ; thigh fat. However, we don't get to chose what area of the body the fat is lost from. Eat healthfully ; be physically active. Calories burned must > calories consumed. To tighten ab's do crunches, reverse crunches, exercise ball crunches, pelvic thrusts, lying leg raises, side bridge ; “bicycling” exercise >.
Carb reduction. Reduce your carbs.
Body sculpting. Invasive to less invasive procedures can target areas. Liposuction traditional or with combination of laser or ultrasound. Radiofrequency devices can target the area and cooling the fat with a machine can work, low level laser diodes work too. This won't change much of the abdominal girth if the protrusion of belly from inside, just what lies skin deep! diet and exercise work too.