A month after childbirth, lochia is almost clean, and there is blood. What's going on?

After delivery, one month lochia is quickly cleaned and blood is also called lochia in clinical practice. The reason for this situation is that the patient's uterine contraction recovery is poor. The patient's decidua tissue is not completely exfoliated, and blood will flow out again. The patient can take drugs to promote uterine contraction under the guidance of the doctor to alleviate and adjuvant treatment.