Liposuction is a kind of plastic surgery and plastic surgery. The principle of liposuction is to suck out excess fat in a certain part of the body through negative pressure suction, so as to achieve the purpose of local rapid weight loss. Whole body liposuction should follow the principle of "small amount and multiple times". Less attraction, less trauma, quick recovery, less pain and no need for general anesthesia. On the contrary, large-scale liposuction surgery is traumatic and painful, and requires a lot of anesthetic drugs, which increases the risk of anesthesia accidents. In addition, liposuction in a large area is a labor-intensive job for plastic surgeons, and it is easy to get tired. Even if there is no life safety problem, the accuracy of liposuction will be reduced due to fatigue, which will further affect the surgical effect. Generally speaking, no more than 4 servings at a time.