The main causes of unclean menstruation include: i. Due to the patient’s long-term bad habits, such as smoking, drinking, excessive stress, frequent late nights, improper diet, so that the normal endocrine function of the ovaries is dysfunctional, ovarian luteal insufficiency or luteal atrophy incomplete, so that the body hormone level is insufficient or progesterone retreat is not complete, can lead to prolonged menstruation and dripping performance; ii. Strenuous sports or heavy physical labor during the menstrual period may affect the healing of the endometrium after exfoliation, which may also prolong the menstrual period and increase the volume of menstruation; third, some women have sex during or just after the menstrual period, which may cause the pelvic tissue to be congested and the endometrium to be congested and edematous due to the stimulation of sexual life, and the exfoliated endometrium may not heal on time, causing incomplete menstruation.