The postpartum dew should be completely cleared within six weeks. However, the exact duration of the postpartum period varies from person to person and is related to the recovery of the mother’s body, so it cannot be generalized. If the dew does not clear after 42 days after delivery, it is an abnormal phenomenon, and you need to go to the hospital for detailed examination and symptomatic treatment. It is the blood or discharge from the vagina after delivery, which may be mixed with blood, fragments of placenta and meconium. After delivery, the uterus needs to shrink gradually from large to infertile state. The wounds between the placenta and the uterus also need to recover, so some tissue will be discharged during this process, known as malodex, which is usually drained within six weeks. There are several ways for women to promote the discharge of nightmare after childbirth. First, pay attention to the cleanliness and hygiene of the vulva to avoid infection, second, be properly active, and third, breastfeeding helps the uterus to contract and discharge nightmare.