Ultrasound lipolysis for waist slimming is a non-invasive treatment that uses the principle of ultrasound emitted outside the body and focused inside the body to irradiate the human waist fat tissue at a fixed point, and through its mechanical and thermal effects of destroying fat cell membranes, the fat cells are ruptured and dissolved, resulting in a lasting reduction in the number of waist fat cells and a lasting waist shaping effect. The overall risk of waist slimming through ultrasonic lipolysis is very low, but there may be some discomfort, as follows: 1. unevenness and bilateral uneven symmetry; 2. fluid accumulation and subcutaneous petechiae: related to early failure to place drainage tubes and inadequate postoperative compression. The fluid can be absorbed on its own if it is small, but if it is large, puncture is performed and local pressure is applied after aspiration. Petechiae may not be specially treated, and may fade on their own in about 3-4 weeks, and may be supplemented with hot compresses and physical therapy after 1 week to promote absorption; 3, postoperative subcutaneous hard nodes: those with little subcutaneous fat are prone to form hard nodes, and may use blood-activating drugs and hot compresses and physical therapy as prescribed by the doctor to assist absorption. 4.Thermal damage may occur, and the extracted fat is destroyed and cannot be reused. If patients want to have autologous fat filling, it is not recommended to slim down in this way; 5.The surgical procedure may cause some damage to the deep block, which may lead to scar adhesions. After recovery, skin pigmentation may also occur. Ultrasound lipolysis waist slimming treatment population is limited, only suitable for BMI between the standard and moderate obese people, need multiple times, multiple courses of treatment to achieve satisfactory results.