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Objective To investigate the cause and treatment of delayed hemobilia after endoscopic retrograde cholangiopancreatography (Methods). ERCP A retrospective analysis was performed on the complications in 1007 patients after ERCP, and the 7 cases of delayed hemobilia were subjected to analysis of time of onset of bleeding, spectrum of disease, blood volume, and treatment process. Results All the bleeding patients had cholangitis. The bleeding occurred at 24 hours to 2 weeks after ERCP, with a small to medium volume of blood (≥ 1000 ml). The conservative medical treatment produced a good outcome in these bleeding patients. Conclusion Delayed hemobilia after ERCP is rare and has a good prognosis following conservative medical treatment. [ABSTRACT FROM AUTHOR]