Sudden heavy bleeding 45 days after hysterectomy may be due to split incision, poor healing of incision and split vaginal stump which leads to bleeding from blood vessels and causes heavy bleeding. Sudden heavy bleeding 45 days after hysterectomy, the first step is to understand the site of bleeding, whether it is bleeding from the incision or bleeding from the vaginal stump split, etc.. Ultrasound and gynecological examination are needed to clarify whether there is bleeding in the pelvis and how the vaginal stump is healing, so that timely treatment can be facilitated. Heavy bleeding after hysterectomy may be caused by premature sexual intercourse after surgery, dry stool, premature increase of abdominal pressure, loose suture ligature, insecure vascular ligature, or combination of high blood pressure, diabetes, etc., which may lead to incision splitting and infection, and cause hemorrhage. After hysterectomy, you should pay attention to a light diet, keep the bowels clear, avoid increasing abdominal pressure, do not smoke, do not drink, pay attention to perineal hygiene. If any abnormal situation occurs after surgery, consult your doctor in time, visit the clinic for examination and treatment in time, so as to avoid hemorrhage and secondary surgery.