Under normal circumstances, malodex will be cleared in about 6 weeks. If black and red blood comes out after the malodex has been discharged, consider that it may be caused by menstrual resurgence, poor uterine repair or residual pregnancy tissue in the uterine cavity: 1. Menstrual resurgence: consider that it may be menstrual resurgence, which can be observed for about 7 days. It is recommended that the uterus should be reviewed in the hospital, and the uterus should be examined by ultrasound. Under the guidance of the doctor, the uterus should be promoted to contract with drugs such as ergometrine and uterine shrinkage, supplemented by Chinese medicine treatment such as biochemical soup, motherwort and Chinese foot bath. In case of combined infection, abdominal pain may occur, timely pathogenic examination should be carried out to clarify the germs and anti-infection treatment should be carried out at the same time, some cephalosporin or metronidazole antibiotics can be given to fight infection; 3. 4, diet-related: some women often use some blood-boosting ingredients or herbs to stew and drink during breastfeeding, similar to rice wine stewed chicken, etc., which may lead to increased blood circulation and thus the manifestation of bleeding again after the discharge of malignant dew, bleeding may be black or red, this situation can be observed again after changing the diet.