If the postpartum white nightmare turns red again, it may be caused by residue in the uterine cavity or poor uterine regeneration. The normal postpartum malodex is divided into red malodex, which lasts 4-6 days after delivery, then turns into plasma malodex, which lasts about 10 days, and then white malodex, which lasts about 3 weeks. If the mother does not pay attention to personal hygiene during the puerperium, or if she has sexual intercourse that leads to puerperal infection, abnormal malodour may easily occur. If there are residues in the uterine cavity that are not discharged after delivery or if the uterine contraction is not good, abnormal nightmare may also occur. It is recommended to go to the hospital for ultrasound and related gynecological examinations in order to identify the cause of abnormal dew and to treat the symptoms.