Symptoms of postoperative fat liquefaction are mainly more oozing, poor or delayed healing of the surgical wound. When there is more fat at the incision during the surgery and the electric knife is used, it is easy to cause aseptic necrosis of adipose tissue after the surgery, forming more oily ooze without other conscious symptoms. Often, when the incision is routinely inspected, yellow ooze is found on the dressing, and when pressure is applied around the incision, there is more ooze under the skin. In addition to this, the incision may show poor or delayed healing, and in the absence of infection the incision is often free of redness, swelling and tenderness, and its margins are not necrotic. When fat liquefaction is suspected, it should be promptly communicated to the doctor for formal management.