A well-toned, flat abdomen is an ideal that many of us desire. In spite of diet, exercises and weight control regimes, it may be difficult in achieving that ideal. An abdomen that is protruding out or is loose and flabby can occur even in people with normal weight and adequate body proportions. Some of them are unfortunately hereditary. For most others, it occurs following pregnancy, previous abdominal surgery, fluctuations of weight or as a natural aging process.

Abdominoplasty, also known as ‘tummy tuck’, is a major surgical procedure that reshapes the abdomen, making it smooth and firm. Excess skin and underlying fat in the abdomen is removed. In post-pregnancy women, this includes removal of most of the stretch marks along with loose saggy skin below the navel. Weakened or separated abdominal muscles are strengthened, and simultaneous liposuction is performed where necessary.

Best Candidates for tummy tuck
It is beneficial for both men and women in good health.
It is very good for all post-pregnancy women. This procedure removes abdominal protrusion, tightens the abdominal muscles and removes lax skin containing stretch marks. The abdomen looks rejuvenated. It appears almost the same as before pregnancy.
It is a good option for both men and women who were once obese and have lost weight later. This procedure takes care of the excess fat deposits or loose sagging skin in the belly, including stretch marks, if any.

Better not to do a tummy tuck when
Both (men and women) plan to go through weight loss regimes in future; and women who plan for pregnancy in the near future. 
It is a better idea to perform this procedure in women after family is complete.

Please also understand that this is a procedure for reshaping the abdomen and not an alternative for diet and exercises to lose weight.

Different types of abdominoplasty or tummy tuck:

Complete Abdominoplasty: Long incision running from one hip bone to the other. Another incision is placed around the umbilicus, separating it from rest of the abdomen. In post-pregnancy females, this will excise out previous Caesarean section scars and surrounding lax abdomen with stretch marks. The whole abdominal skin and fat is separated from the muscles. Excess skin and fat is excised out. Lax abdominal muscles are tightened with sutures. Additional liposuction is frequently performed to remove stubborn fat pockets in the abdomen. Results are excellent, with taut muscles and taut abdomen, with nice shape and contours.