Under normal conditions the subcutaneous fat of the back is thin and uniform, showing the contour of the back tissue, only in obesity is it swollen and too flat. In the center of the back is the spinous process of the crural vertebrae, flanked by the powerful sacrospinal muscles, and then outward to the back plane consisting of the ribs and scapulae. The back fat is characterized by a flat and tighter fat right behind the back, and a flabby, noticeable accumulation of fat at the junction with the axillary or quarter-rib areas on either side. Back liposuction and weight loss surgery is to remove a layer of fat evenly, so that the tension of the skin is appropriately increased, to show the flow of the back changes, showing an attractive style, and professional back liposuction and weight loss surgery tends to focus on the two sides of the face, that is, the part of the junction with the armpit, the upper end of the back is connected to the shoulders and neck, and the lower end to the lumbar iliac region, to complete the suction of the fat of the back, and at the same time, it is a test of the experience of the expert surgeon, skills and physical ability. The most important feature of back liposuction is the large area of liposuction and the thin layer of fat in this area, which shows the contour of the back tissues, which are swollen and too flat only in obesity. In the center of the back is the spinous process of the crural vertebrae, flanked by the strong sacrospinal muscles, and to the outside is the plane of the back consisting of the ribs and scapulae. Before proceeding with the procedure, we need to look at the characteristics of the fat distribution in our back, and this approach can expertly address the condition of a bloated back.