The yellow liquid flowing out of the wound may be tissue fluid, inflammatory fluid after infection or fat liquefaction of the subcutaneous tissue of the wound. Specific also need to be based on the liquid traits and combined with personal situation analysis. 1, tissue fluid: If it is epidermal abrasion early, skin breakage after the wound out of transparent or light yellow liquid, may be tissue fluid. Most occur within 48h after the injury, if there is no redness, swelling, pain, 48h will gradually reduce the exudation, generally no special treatment, disinfection bandage and wait for crust can be; 2, inflammatory fluid: if the wound is inflamed or purulent infection, may also flow yellow liquid, the liquid may be thicker, and may also be accompanied by redness around the wound, pain. At this time, we should pay attention to disinfect the wound with iodophor, add dressing dressing, if the dressing dressing after soaking wet situation is more obvious, it is necessary to disinfect and change the dressing more times. At the same time keep the wound clean and dry, if the wound continues to ooze yellow liquid, it is recommended that the patient seek medical advice and use some penicillin antibiotics for treatment as prescribed by the doctor; 3, fat liquefaction: mostly seen in obese, long-term bedridden, poor nutritional status or diabetic patients. As the fatty tissue under the skin of the wound liquefies, some yellow liquid grease will flow out. It is necessary to disinfect and clean the fatty liquefied tissue, then drain with drainage strips to reduce the accumulation of exudate and promote wound healing.