When the drainage fluid of pancreatic fistula is not much and there is blood, you can take antiemetic drugs and do abdominal CT as early as possible. Pancreatic fistula can be caused by pancreatic injury or pancreatic surgery, and it needs to be treated with drainage, and the drainage fluid will decrease gradually. If the drainage fluid is found to be bloody, it suggests that bleeding has occurred, and at this time, you can take antiemetic drugs, which can play the role of blood coagulation after being absorbed through the digestive tract, and it may make the bleeding stop. After the occurrence of pancreatic fistula, if bleeding occurs, you need to improve the relevant examinations, including routine blood, ultrasound, CT, etc., to determine the severity of the condition, and then choose the appropriate treatment, such as oral hemostatic drugs, intravenous hemostatic drugs, and so on.