Late menstruation is related to the following factors: environmental changes, medication, IUD, fibroids or functional uterine bleeding, luteal insufficiency, etc. To sum up, there are two major aspects: those caused by organic pathologies such as fibroids, endometriosis, pelvic inflammatory disease, etc.; those caused by non-organic pathologies such as IUDs, hormonal disorders caused by medication, luteal insufficiency, etc. Diseases of the blood system and hepatitis, nephritis, etc. can also cause prolonged periods. If the symptoms of prolonged menstruation and excessive bleeding occur, we should first distinguish and identify them, do ultrasound and endocrine hormone examination to determine whether they are organic or functional diseases, and treat them separately for specific reasons, and pay attention to personal hygiene during menstrual dripping when the cervical opening is open and easily infected.