After giving birth to a child for more than forty days, sometimes there is still bleeding need to be treated according to the cause of the disease, the uterus is not good at restoration of the uterus to give drugs to promote uterine contraction treatment, the uterine cavity needs to be cleared up, the uterine cavity needs to be infected with anti-infective treatment. 1. Poor uterine regeneration: it can lead to dislodgement of the thrombus formed on the peeled surface of the placenta and cause prolonged uterine bleeding, combined with ultrasonography can assist in the diagnosis, and need to be given medication to promote uterine contraction therapy, such as hysteronin, in accordance with medical advice. 2. Uterine residual: when there are fetal membranes and meconium left in the uterine cavity, it will cause uterine bleeding for a long time due to the mechanized necrosis of the residual tissues, and ultrasonography can assist in the diagnosis. The diagnosis can be made by ultrasonography. It is necessary to carry out the hysterectomy when the intravenous access is established and the blood preparation is ready, and to give the medicines such as hysteronin to promote contraction treatment and antibiotics such as cefuroxime sodium to prevent infection treatment. 3. Infection: when combined with infection, it can cause endometritis, myometritis, etc. It can also cause long duration of bloody menstrual discharge, accompanied by fever, foul-smelling discharge, etc. Combined with the clinical manifestations, blood tests and other tests, it can assist in the diagnosis. Need to give a sufficient amount of effective antibiotic anti-infection treatment, such as cefuroxime sodium combined with tinidazole. More than forty days after giving birth to a child sometimes there is still bleeding when you need to go to the hospital in a timely manner in order to identify the cause, and timely treatment.