If there is fluid in the uterine cavity and vaginal bleeding at 42 days after delivery, it is considered to be caused by poor uterine regeneration. If there is no pain in the lower abdomen and no pressure pain in the uterus after gynecological examination, you can take new biochemical tablets to promote contraction of the uterus and discharge the blood in the uterine cavity and go back for a review in 7-10 days. If there is no vaginal bleeding at this time and there is only simple fluid in the uterine cavity, consider whether it is white malignant fluid that has not flowed cleanly. It is recommended to keep the vulva clean, change the sanitary napkin regularly and observe the color and amount of the malodex. If the color of the milk is yellow and there is pain in the lower abdomen, it may be caused by an infection, so it is recommended to take oral antibiotics and to review it in a week.