Bariatric surgery -it is a metabolic surgery for long term weight loss. It has an effect over the entire body. It is an internal surgery that restricts intake and absorption of food and thus results in caloric restriction and consequently weight loss. It helps in resolution of obesity related diseases. The weight loss takes place slowly over a period of 6-12 months.Liposuction- It is a cosmetic surgery for giving the body a better shape and contour. It is done only for a particular area or body part to give it a better aesthetic look. It is an external surgery which removes fat from under the skin. There is no effect on obesity related diseases. The results are immediate but weight loss is limited to the amount if fat removed at the time of surgery.