One month after cesarean section there is still blood, it may be a normal physiological phenomenon, or it may be caused by disease factors, such as uterine inflammation, residual in the uterine cavity, accumulation of blood in the uterine cavity, etc. You should go to the hospital for examination to clarify the cause. I. Physiological phenomenon After cesarean section, bloody malodorous fluid may appear intermittently due to the slow recovery of the maternal uterine incision, which affects the contraction of the uterus. If there are no other symptoms, it can be considered as a normal physiological phenomenon. There is no need to worry too much at this time, as the bleeding will disappear gradually as the uterus recovers. You can eat more light and nutritious food, such as shrimp porridge. Second, disease factors 1, uterine inflammation: childbirth leads to endometrial damage, local bacterial infection, you can follow medical advice to use antibiotic treatment, and pay attention to rest, avoid strain; 2, residual in the uterine cavity: due to placenta, fetal membrane, mucosa and other tissue residue in the uterus, affecting the uterus contraction, resulting in bleeding. At this time, you can go to the hospital to review the uterus and adnexal ultrasound to check the status of the residues in the uterus. If the residue is small, new biochemical pellets can be taken to speed up the discharge of the residual tissue. If the residue is large, curettage will be required. Daily breastfeeding can be done to stimulate uterine contraction. 3. Accumulated blood in the uterine cavity: In addition to vaginal bleeding, it can be accompanied by lower abdominal pain and the possibility of accumulation of blood in the uterine cavity needs to be considered. You can use pro-uterine contraction drugs and massage the uterus under the guidance of the doctor to assist the discharge of the accumulated blood.