The possible causes of lumbago symptoms after menstruation mainly include: 1, the patient himself suffers from pelvic inflammatory disease, uterine fibroids, pelvic cysts, cervicitis and other gynecological organic diseases, which cause significant pelvic congestion during menstruation, thus causing lumbago symptoms within a short period of time after the end of menstruation. 2, the usual poor living habits, prolonged sedentary or lack of physical exercise, resulting in chronic strain on the lumbar muscles or 3.If sexual intercourse occurs during menstruation, the stimulation of sexual intercourse leads to chronic pelvic congestion, which also causes symptoms of lumbago after menstruation. 4.When suffering from urinary system stones, urinary system infection, urinary system tumor disease, it can cause lumbago.