What causes prolonged postpartum lochia that does not clear up?

Causes of prolonged postpartum lochia: 1. Poor uterine contraction: This is a common cause of persistent lochia, possibly due to inadequate recovery after childbirth, resulting in ineffective uterine contraction. 2. Weak constitution: Some women have a naturally weak physical condition and poor recovery capacity, leading to impaired discharge of lochia. 3. Retained tissue: If placental or fetal membrane tissues are not completely expelled during delivery and remain in the uterus, they can interfere with normal lochia discharge. 4. Gynecological infections: Conditions such as endometritis or cervicitis may cause prolonged lochia, abnormal color, or foul odor. 5. Intrauterine infection: Failure to maintain proper personal hygiene after delivery may lead to intrauterine infection, resulting in persistent lochia. All of the above factors may contribute to prolonged postpartum lochia. Women experiencing such symptoms should seek timely medical attention to identify the underlying cause and receive appropriate treatment.