Side effects and hazards of liposuction include delayed wound healing, bleeding, edema, subcutaneous nodules, necrosis and sensory abnormalities in the postoperative flap area. 1. Delayed wound healing: Infection in the wound area can occur after liposuction surgery if not properly cared for, resulting in delayed wound healing. 2. Bleeding: subcutaneous bruising will occur when capillary rupture is caused by improper operation in the process of liposuction. 3. Edema: damage to tissues during surgery will cause tissue cells to secrete fluid, causing local swelling. 4. Subcutaneous nodules: The damaged subcutaneous structures or hematoma will change after surgery and manifest as subcutaneous nodules. 5. Postoperative necrosis and abnormal sensation in the flap area: Liposuction surgery may damage the blood supply of the skin and cause necrosis in the flap area if too much fat is extracted; if the nerves are damaged during the surgery, abnormal sensation such as numbness and pins and needles will also occur.