Excess skin, fat, and tissue can be heavy, so removing it can cause some weight loss. However, your plastic surgeon may use the excess tissue to reshape your buttocks for a perkier rear, which could lessen the amount of resulting weight loss. In addition, you should not use butt lift surgery as a weight loss technique, since plastic surgery is no substitute for proper nutrition and exercise.
How long you are off work depends on your occupation. If you do clerical work (i.e. stockbroker, teacher, or programmer), you can return to work when you feel up to it. This usually takes about two to three days. Do not go to work for three weeks if you do manual labor (i.e. entertainer, truck driver or personal trainer). Regardless of your employment, do not lift anything weighing more than five pounds for three weeks.