The uterus should return to its pre-pregnancy state 6 weeks to 8 weeks after delivery. If the uterus does not return to its pre-pregnancy state and there is incomplete malignant discharge, it may be due to poor uterine regeneration. There are several reasons for poor uterine rejuvenation. 1. endometritis or pelvic inflammatory disease; 2. maternal uterine fibroids or adenomyosis before pregnancy, which affects the contraction of the uterus; 3. excessive posterior tilt and retroflexion of the maternal uterus, which affects the discharge of malodex. 4. The maternal placenta is too large, so the smooth muscle of the uterus to which the placenta may be attached is thin and the contraction force is weak, which also affects the uterine rejuvenation. While postpartum exclusive breastfeeding, when the baby sucks the breast, it can promote the release of oxytocin in the body and promote the contraction of the uterus. Therefore, breastfeeding is beneficial to the recovery of the uterus. When there is incomplete uterine regeneration, the mother will experience a series of discomfort such as prolonged duration of bloody malignant dew, high volume and pain in the lower abdomen. At this time, it is urgent to go to the hospital and ultrasound is recommended to check the condition of uterine regeneration. If this is the case, you can choose medication to treat the symptoms and stop the bleeding in time. Drugs often used include uterine contraction, biochemical tablets or strong biochemical capsules to promote uterine contraction, eliminate stasis and produce new blood, expel the malignant dew and restore a normal uterus. If there is inflammation and infection, choose suitable antibiotics to control the infection. It is best to go to the delivery hospital for examination and treatment if the uterus is not fully restored.