Fat liquefaction after cesarean section is mostly seen in obese patients, which is caused by the destruction of fat blood transportation, lack of nutrition and necrosis of fat cells. Fat liquefaction is the process in which the fat tissue in the wound changes from solid to liquid. Fat liquefaction does not occur in normal people after cesarean section, but in the case of obese patients with more body fat, the chance of fat liquefaction will be higher. Fat liquefaction is due to the surgical process may cut off blood vessels, resulting in a reduction of local blood flow, blood flow has been destroyed will lead to a lack of nutrient supply of fat cells, which will lead to necrosis, and ultimately cause fat liquefaction. For patients with fat liquefaction, if the condition is serious, they need to actively cooperate with the doctor to standardize the treatment, so as to avoid affecting the wound healing.