If there is blood again after the cleansing of postpartum dew, the main check is whether there is poor recovery of the uterus, gynecological inflammation, menstrual resurgence and so on. It is recommended to go to the hospital for postpartum re-examination according to the situation, to clarify the cause and then targeted treatment. Common causes and treatment methods: 1. Poor uterine recovery: residual placental tissue in the uterine cavity, poor recovery of placental attachment site and other factors can lead to poor uterine recovery. At this time, the patient may have abdominal pain, vaginal bleeding dripping, odorous discharge and other symptoms, which can be treated under the guidance of professional doctors, such as anti-inflammatory, pro-uterine contraction, and removal of residues in the uterine cavity if necessary; 2, gynecological inflammation: due to trauma to the reproductive tract during childbirth, resistance decreases, the mother is susceptible to germ infection, which can lead to increased vaginal discharge, vaginal bleeding and other symptoms, which need to be combined with the culture of pathogenic microorganisms Choose appropriate antibiotics; 3. Menstruation resumes: after the malodex is clean, the ovaries are affected by prolactin and ovulation is inhibited, most women have no ovulation and no menstruation in the early stage of breastfeeding, usually it will resume in 6 months after delivery. If you do not breastfeed, ovulation will resume in about 2 months, and the menstruation can resume earlier, and in some cases, the menstruation will resume at the end of the puerperium. Precautions: pay attention to personal hygiene, change your underwear regularly, wash your vulva frequently, and keep it clean and dry. During the puerperium period, that is, 6 weeks after delivery, avoid conjugal life, avoid sitting in the bath to avoid infection, and seek medical attention when necessary.