This paper presents collaborative problem - postoperative hemorrhage with a focus on postoperative bleeding of the most performed surgical procedures in the European Union in 2017. The paper describes what is a collaborative problem, surgical procedures, signs of postoperative bleeding, the likelihood of postoperative bleeding, treatment of postoperative bleeding and general preoperative preparation. Further, nursing interventions, hemorrhagic shock, transfusion treatment, and the hemostasis process are being described. Preoperative preparation begins with the decision of the surgery that surgery is required. The preoperative preparation is carried out with the goal of preparing the patient for the upcoming operation, which is achieved through a plan of health care, nursing diagnosis and intervention. Preoperative preparation ends with transporting the patient to the operating room where the operation is performed. After the operation, the patient stays in the waking room and begins the postoperative period, which lasts until release from the hospital. The paper highlights the role of the nurse in postoperative patient care and describes the discharge letter. The results of the most frequent surgeries from 2017 in the European Union are processed and specific signs of postoperative bleeding after these procedures are described, as well as the nursing role and interventions. Hemorrhagic shock develops when a large amount of blood is lost. The importance of knowing the clinical picture of bleeding and consequential hemorrhagic shock, nursing intervention in transfusion treatment, and monitoring and detection of posttransfusion reaction was emphasized.