Liposuction is the most commonly used cosmetic surgery procedure to reshape the body through fat suction and removal, thus satisfying the desire for beauty, youth, fitness and vitality. Liposuction is a surgical procedure in which a small-diameter liposuction needle attached to a negative pressure suction device is used to enter the body’s fat layer through a small incision on the surface of the body to suction fat. The surgeon connects the liposuction needle to a powerful negative pressure device and suctions back and forth across the fat layer of the body. The fat is trapped in the holes at the end of the needle, and the back-and-forth motion of the needle causes the fat to tear into small tissue fragments that are sucked into a collection device. Fat is less dense and structurally fragile than adjacent blood vessels and nerves, so it is more likely to be suctioned out, while nerves, blood vessels and fascial tissue remain intact and undamaged. The neurovascular bundles that connect the deep myofascia to the dermis, i.e. the fascial framework, are preserved last. With the reduction of subcutaneous fat, there is a corresponding reduction in subcutaneous volume and contraction of the subcutaneous tissue and skin, resulting in body reshaping. Body reshaping excision is the removal of loose, redundant skin and subcutaneous tissue and the tightening of adjacent skin and subcutaneous tissue. Abdominoplasty and thigh lifts are the most commonly performed body reshaping excisions on the lower part of the torso and around the buttocks and groin. Although effective, this procedure is associated with greater physiologic damage, patient pain, and more postoperative complications than liposuction. Patient Selection and Evaluation Liposuction and body reshaping surgeries often attract many patients who are often under the mistaken belief that these surgeries will cure obesity. While liposuction is excellent for improving body shape defects, it does not permanently maintain post-operative weight. Not only do obese patients not benefit from these surgeries in the long term, but there is an increasing risk factor for postoperative complications. Therefore patients with a body mass index higher than 30 should not undergo this procedure and should be advised to undergo weight loss counseling instead. Selection of patients with body shape defects Some patients who are not well-proportioned and have a high concentration of localized fat are able to achieve satisfactory results with liposuction. Some patients who are of normal weight but have a greater concentration of fat in the thighs and buttocks (unilateral or bilateral) are particularly suitable for liposuction. For most of the body, if the pinch test shows a fat thickness equal to or higher than 3cm, it indicates more subcutaneous fat and is suitable for liposuction. For those patients who have excessive subcutaneous fat deposits all over the body and have a slightly higher than normal body weight, satisfactory results can also be obtained by liposuction, but the surgery involves a larger area and is more dangerous. The long-term effects of removing large amounts of subcutaneous fat have yet to be proven. In addition, for those patients with loose and sagging skin, good results can be obtained through excision. Abdominoplasty is the tightening of the lower part of the trunk by removing excess skin from the abdomen. Abdominoplasty is an effective treatment for loose and sagging skin on both the front and peripheral sides of the abdomen. Skin laxity in the buttocks and thighs can be corrected with a buttock lift. Liposuction is also frequently used as an add-on procedure to resection. The degree of laxity of the abdominal wall fascia should be evaluated preoperatively. Overlapping sutures to close the lax fascia can essentially improve the abdominal wall profile. If the protrusion of the abdominal wall fascia is due to the accumulation of fat in the abdominal cavity, the best way to lose weight and shape the abdominal wall is through diet and exercise. Overlapping and tightening the fascia in such cases usually results in recurrence of the abdominal wall bulge.