Yellow secretion from surgical wounds may be oozing tissue fluid, inflammatory fluid from wound infection or liquefaction of adipose tissue. 1. Tissue fluid: yellowish secretion may flow out of the wound when the skin surface is rubbed, mostly occurring within 48 hours after the injury, usually without redness, swelling, heat and pain, and the exudation gradually decreases after 48 hours, no special treatment is needed, and continue to be observed after disinfecting and bandaging. 2. Wound infection: when the wound has inflammation or purulent infection, it will usually flow a thicker yellow secretion, which may also be accompanied by redness, swelling and hot pain around the wound. At this time, the wound should be sterilized and bandaged, change the medicine regularly, and keep the wound as clean and dry as possible. If the wound continues to ooze yellow secretion, timely medical treatment should be sought; 3. Fat liquefaction: the subcutaneous adipose tissue of the wound liquefies, and some yellow oil droplet-like secretion will flow out, and the wound is usually without redness and swelling. Most commonly seen in obesity, diabetes or long-term bedridden patients. When the fat liquefies, the liquefied tissue should be sterilized and cleaned up, and drainage treatment should be carried out to reduce the accumulation of exudate in order to promote wound healing. If you find yellow discharge from the wound, you should pay attention to it and go to the hospital in time for treatment.