Closed weight loss surgery is also called liposuction. The operation uses a small incision in the skin, and with the help of a special suction head and negative pressure suction device, the adipose tissue accumulated under the skin is absorbed to achieve the effect of losing weight. Although it came out late, it is popular all over the world because of its small incision and relatively small trauma to the body. Liposuction is generally only suitable for adults, not for teenagers, children and patients with bleeding and infectious diseases, such as hemophilia, aplastic anemia and people with serious internal infections. Adults can suck almost every part of the body surface. Among them, localized fat accumulation is the first indication. For those severe patients with systemic simple obesity, repeated liposuction can improve physical appearance and relieve psychological pain. Patients with obvious abdominal fat can also do simple liposuction first if the skin of the lower abdomen is not drooping.

Open weight-loss surgery refers to the doctor's removal of excessively loose and accumulated skin and fat under direct vision, and sometimes it is necessary to correct the deformation of related muscles or aponeurosis at the same time to achieve the purpose of weight loss. Compared with liposuction, this operation is more effective, and it is mainly suitable for patients with severe sagging of skin and adipose tissue, such as patients with obvious abdominal fat accumulation, which has seriously affected their work and life. Performing this operation can play a better role. This operation can be used for women who have loose skin, muscles and aponeurosis due to multiple pregnancies or other reasons, and for women who have sagging skin and fat due to short-term drastic weight loss of obese patients. However, this kind of operation has long incision, big scar, great trauma to human body and many complications. Unmarried young women or women who are preparing for pregnancy and childbirth and those with scar constitution should be banned.

Combined weight loss surgery is also a combination of liposuction and open surgery. In recent years, it has been highly praised by people in plastic surgery circles at home and abroad because it makes up for the poor effect of simple suction to solve excessive skin relaxation and avoids the huge trauma caused by open surgery. Combined surgery is especially suitable for patients with moderate and severe abdominal obesity to lose weight. It uses liposuction to remove excess adipose tissue, and uses skin and liposuction to tighten loose skin and restore elasticity, so the effect is remarkable. For patients with severe abdominal fat accumulation, loose skin and obvious apron-like deformity, the combined operation has obvious effect. However, the degree of trauma and complications of combined surgery are more than those of simple liposuction.