Liposuction is the use of physical and chemical methods to dissolve or break the subcutaneous fat tissue, through the liposuction needle and negative pressure pipe will be broken dissolved fat suction out. The main hazards of liposuction thighs are as follows: 1, numbness and abnormal sensation in the operation area: after liposuction of the legs, the skin sensation in the liposuction area is bound to be affected, numbness and abnormal sensation, such as occasional pins and needles, ants, etc., which generally recover gradually 1-3 months after liposuction of the legs; 2, necrosis of the skin flap in the operation area: if too much subcutaneous fat is sucked out during liposuction of the legs, which destroys the blood circulation of the skin, there may be Skin blistering or even necrosis, leaving scar after leg liposuction, which affects the appearance; 3, delayed recovery after leg liposuction: the leg liposuction incision is usually a few millimeters deep, which is easier to heal, but if there is excessive damage, infection, fluid accumulation, etc., there may be delayed healing, and the small scar left after healing is also more obvious; 4, unevenness of the operation area: leg liposuction is not absolutely uniform, so there will be unevenness in the operation area after liposuction. Therefore, there will be unevenness in the area after liposuction. Mild unevenness is inevitable. Wearing elastic shaping pants after liposuction and appropriate massage for several months can gradually flatten the area; 5.Serious asymmetry of liposuction area: caused by improper design and operation before surgery, it needs to be trimmed by liposuction again; 6.Infection: during the process of liposuction, bacteria or virus may be brought into the subcutaneous fat layer, which may cause local infection, and then oral antibiotic treatment is needed.