(1) The liposuction site is seriously asymmetrical: this side effect is caused by improper preoperative design and intraoperative operation, and needs liposuction again. (2) Uneven operation area: Liposuction is not absolutely uniform, so the operation area will be uneven after operation. Mild unevenness is inevitable, and it can be gradually flattened after 1-3 months. But it depends on the skill of the doctor. If there is serious unevenness that cannot be recovered after 3-6 months, liposuction is needed again. (3) Delayed wound healing after operation: Liposuction wounds are generally several millimeters deep, and healing is relatively easy. But if there is excessive injury, infection, effusion, etc. Delayed healing may occur, and the small scars left after healing are also obvious. (4) Skin flap necrosis in the postoperative operation area: If the subcutaneous fat is sucked out too much during liposuction and weight loss surgery, which destroys the blood circulation of the skin, skin blisters or even necrosis may occur, leaving scars after surgery and affecting the appearance. This is mainly determined by the technical level of doctors. (5) numbness and abnormal sensation in operation area: After liposuction, the skin sensation in liposuction area will be inevitably affected, and the numbness and abnormal sensation such as occasional acupuncture sensation and ant walking sensation will gradually recover after 1-3 months.