Old bleeding is bleeding that does not flow out of the body immediately, but accumulates inside the abdominal cavity or in a part of the body, and then flows out of the body after a period of time through the abdominal drainage tube or is drained out of the body after a laparotomy. The color of old bleeding is black, dark brown, brown, coffee, etc. It is accompanied by blood clots and sometimes secondary to infection. The more common cases are liver rupture or spleen rupture, which are characterized by old bleeding because the degree of injury is relatively mild, the patient’s vital signs are stable, no emergency surgery is performed, and the blood is drained outside the body through puncture after a period of time in the abdominal cavity.