The dew is the tissue containing blood and necrotic meconium that is discharged from the vagina as the uterine meconium is shed after delivery. Whether women have a normal delivery or a cesarean section, the dew will gradually clean up within 42 days after delivery. If the dew is still not clean after two months, it is mainly related to postpartum infection, intrauterine residue, poor recovery of the uterus, malignant lesions of the reproductive system, etc. If a woman has a puerperal infection, the endometrium will become inflamed, causing irregular shedding of the endometrium, resulting in recurrent and incessant malodorous dew. If the placenta and membranes remain in the uterus, or if the uterus is poorly regenerated, this may also cause unclean dew. For women who have had a cesarean section, residual placenta and fetal membrane tissue rarely occurs, and poor recovery of the uterine incision or even diverticulosis of the incision should be considered as the cause. In addition, patients should also exclude the possibility of malignant lesions of the reproductive system, such as choriocarcinoma and cervical cancer. If the mother’s malignant discharge has not been cleared for two months, the patient should go to the gynecology department for abdominal ultrasound, blood HCG and other related tests to clarify the cause and then carry out targeted treatment. Pay attention to keep the perineum clean and hygienic to prevent infection. In addition, the mother should pay attention to strengthen nutrition and eat more protein-rich foods, such as lean meat, eggs and milk, to promote physical recovery.