The long duration of menstruation is considered to be caused by cervical polyps, polyps in the uterine cavity and thickening of the uterine lining. In this case, you need to pay attention to rest, keep the local clean, avoid infection, need to go to the hospital for gynecological internal examination, as well as pelvic ultrasound and hormone six tests. If it is caused by cervical polyps need to be surgically removed; if it is caused by polyps in the uterine cavity, you can first take oral antibiotics and antiemetic drugs, and then do hysteroscopic surgery to remove the polyps within 3-7 days after the menstrual period is cleared, the polyps that have been removed need to be examined by a pathologist; if it is caused by thickening of the lining of the uterus, the first thing that we suggest is to curettage treatment, and the pathology of the scrapings need to be examined by a pathologist as well.