Abdominoplasty or tummy tuck is a surgical procedure that removes excess skin and fat from the middle and lower abdomen. It also tightens the muscles of the abdominal walls leaving a firmer, flatter abdomen. This kind of surgery may be helpful for both men and women, but it is particularly useful for women who, despite diet and exercise, have excess skin as a result of pregnancies or those who have lost significant amounts of weight causing loose skin and fat.