Postpartum hemorrhage generally occurs within 24 hours after giving birth, and sometimes it can occur 1-2 weeks postpartum. It is important to pay special attention during this time to see if there is an increase in vaginal secretions or bleeding. Generally, after giving birth, it is necessary to observe in the delivery room for two hours; if there is no bleeding within those two hours, the patient can be moved back to the ward. The main causes of postpartum hemorrhage include poor contraction of the uterus, retained placental tissue, abnormalities in the coagulation function of the woman's blood, and tears in the birth canal.