The normal puerperium period is 42 days, and the duration of postpartum malignant dew is usually around 4-6 weeks, or 28-30+ days. Therefore, it is normal to have a little bit of malodorous fluid 20 days after delivery, but if there are poor contractions of the uterus or residual placenta or fetal membranes, the bleeding time will be prolonged. Therefore, if the amount of nightmare exceeds the amount of menstruation, or if there is obvious abdominal pain or odor, you need to be alert to the presence of uterine infection or poor uterine regeneration, and in this case you need to go to the hospital. At the same time, you should pay attention to rest, do not recommend strenuous exercise during the puerperium, rest is the main thing, and breastfeed on time.