Normal menstruation is regular, with cycles of 21-35 days and periods of 3-7 days. If there is a small amount of vaginal bleeding or bloody discharge 7 days before the onset of menstruation, it is mostly related to ovulatory menstrual disorders. If you have endometriosis you will experience similar symptoms. Women may experience a small amount of premenstrual bleeding just after the birth control ring is put in place, which becomes regular after 6 months or so, with symptoms of premenstrual bleeding, viability hormone six tests and pelvic ultrasound to clarify the cause of the bleeding. If it is caused by ovulatory menstrual disorders, improve the symptoms by hormone supplementation. If it is a side effect of wearing a birth control device, observe for a few months, and if the symptoms persist, perform a birth control device removal surgery. If you are suffering from endometriosis, accompanied by a significant increase in menstrual flow, you can take oral contraceptive pills to improve the symptoms, usually pay attention to menstrual hygiene, prohibit coitus during menstruation, pay attention to warmth, and avoid cold, stimulating food.