Fresh blood flow one month after cesarean section may be due to physiological factors, such as poor uterine regeneration and menstrual flow; it may also be due to pathological factors, such as late post-partum hemorrhage, uterine inflammation, and residual placenta and meconium, which need to be clearly identified and then treated according to the symptoms. Common causes and treatments I. Physiological factors 1, menstruation: a small number of women can resume menstruation one month after cesarean section, if the amount and duration of bleeding are the same as those of previous menstrual cycles, it may be considered menstruation, and personal hygiene should be paid attention to in the daily life, avoiding tub baths and sexual intercourse, and changing and washing underwear frequently. 2, poor uterine recuperation: if there is small amount of vaginal bleeding without abdominal pain, it may be considered post-partum bleeding, and it may be considered post-partum bleeding. Consider poor uterine recovery after delivery. It takes about 56 days for the uterus to return to its pre-pregnancy state after a normal cesarean section. If the uterus has not fully recovered in the first month after delivery, a small amount of vaginal bleeding may occur, which is related to uterine regrowth and incision healing. If the amount of vaginal bleeding is small, it can be observed temporarily. If the bleeding increases or is accompanied by abdominal pain, you need to go to the hospital in time to check whether the following diseases may exist. Disease factors 1, late postpartum hemorrhage: If the amount of vaginal bleeding is large, obviously more than the amount of menstruation and accompanied by blood clots, then consider the possibility of postpartum hemorrhage, you need to go to the hospital as soon as possible for a clear diagnosis, can be used to promote uterine contractions under the guidance of the doctor, such as hysterotonin. If the medication is ineffective, surgery can be chosen to deal with the problem, if necessary, interventional therapy; 2, uterine inflammatory reaction: the uterus in the process of recovery, if the uterine mucous layer of inflammation, resulting in uterine inflammatory reaction, there will also be bloody discharge. Usually anti-inflammatory based, intravenous drip or oral antibiotics, pay attention to if in the breastfeeding period of antibiotic selection; 3, placenta, meconium residue: postpartum uterine cavity there may be part of the meconium residue, resulting in vaginal bleeding one month after delivery. ultrasound to confirm the diagnosis of placenta residue, according to the size of the residue, the situation of bad dew, the time of the placenta residue, the residue of the smaller can choose conservative treatment, such as contraction of the contraction to enhance contraction If the residue is small, conservative treatment can be chosen, such as uterotonin to strengthen contraction, and Chinese medicine such as ShengHua Tang and YiMuCao to remove stasis. If the residue is large, bleeding is heavy, or the time of placenta remains is long, and the conservative treatment is not effective, it is recommended to perform a hysterectomy. Breastfeeding can stimulate the secretion of oxytocin and help the uterus to recover. It is recommended to have regular postpartum checkups to ascertain the recovery of the body and the uterus, and at the same time, pay attention to strengthening personal care and developing good living habits.