Thank you for your question regarding loose skin in your abdomen, buttocks, and thighs after VSG surgery and 100-pound weightloss. Thank you for attaching your photos and history. I would highly suggest you undergo a 360 circumferential lower body lift. During a 360 circumferential body lift, an incision is made just above the pubic region over the hips and joins at the top of the buttock crack. During this procedure, the stomach is lifted and reduced, the stomach is flattened, the six-pack muscle is brought together, the belly button is recreated, the hips are lifted and reduced, and the buttocks are lifted and reduced. During the final resection, excess skin and fat of the abdomen, hips, and buttocks are completely removed. The final scar line is underneath the reasonable bikini line. Regarding your thighs, I would advise thigh liposuction to be combined with a longitudinal vertical medial thigh lift. During this procedure, an incision is made from the groin to the knee, removing excess skin and fat. If the skin and fat around your knees don't bother you, a limited incision can be performed by extending the incision partially down the inner thigh. The circumferential 360 body and thigh lift can be combined in one surgery. Please allow yourself two to three-week of recovery. Plan to wear your garment for about six weeks. I hope I answered your questions regarding your abdomen, buttocks, and thighs and what procedures I recommend.