Uterine adhesions may cause hemorrhage after pregnancy. Hemorrhage after pregnancy mostly occurs in late pregnancy, but not all uterine adhesions lead to hemorrhage. Uterine adhesions are caused by damage to the lining of the uterus, resulting in adhesions, and often occur in patients with a history of uterine manipulation, such as abortion, etc. They can also be seen after cesarean section and after uterine mediastinum surgery. Uterine adhesions are often manifested as decreased menstrual flow, infertility or even amenorrhea. When the patient is pregnant, vaginal bleeding may occur in the early stage due to the growth of the embryo and the adhesion bands being propped open, usually in a small amount; placenta implantation may occur in the late stage of pregnancy, which may lead to hemorrhage. Patients suffering from uterine adhesions or vaginal bleeding after pregnancy need to consult a doctor and follow medical advice.