Many women have a love/hate relationship with their “best friend”. It’s not exactly what you look forward to every month, but if it’s late, you get anxious and fidgety. Women’s menstrual cycle, menstrual blood volume, and menstrual blood color are very unique signals of women’s health, and their small changes may be a reflection of your endocrine disorder, inflammation, and other diseases. With decades of clinical experience, our gynecologists suggest that common abnormal vaginal bleeding symptoms in women should be alert to possible gynecological diseases and clinical manifestations of many gynecological tumors. Symptom 1: Significantly increased menstrual flow, double or more than the usual amount, accompanied by large blood clots, sudden standing up, a large amount of menstrual blood gushing out, and in severe cases, dizziness, blurred vision, weakness and other anemic manifestations. Possible causes: Bleeding induced by placement of birth control ring, myometriosis, ovulatory type dysfunctional uterine bleeding. Symptom 2: Irregular vaginal bleeding at regular intervals, sometimes stopping, sometimes in large amounts, sometimes in small amounts. Possible causes: Anovulatory functional uterine bleeding, early endometrial cancer. Symptom 3: Continuous vaginal bleeding with no intervals of cleanliness, the amount of bleeding may be more or less. Possible causes: Malignant tumor of the reproductive tract, cervical cancer or endometrial cancer Symptom 4: Irregular vaginal bleeding accompanied by increased leucorrhea, abnormal color (yellow, coffee, green, etc.) and foul odor. Possible causes: Advanced cervical cancer, endometrial cancer, submucosal fibroids combined with infection. Symptom 5: Monthly menstruation is on time, only the volume of menstruation is significantly increased and the duration of menstruation is prolonged. Possible cause: Uterine fibroids. Symptom 6: Vaginal bleeding during pregnancy in women of childbearing age. Possible causes: Miscarriage, ectopic pregnancy, gravida. Symptom 7: Vaginal bleeding when menopause is imminent. Possible causes: Anovulatory dysfunctional uterine bleeding, malignancy. Symptom 8: Vaginal bleeding during intercourse or gynecological examination, bright red in color, bleeding can stop on its own after 2-3 days, but usually not accompanied by abdominal pain. Possible causes: advanced cervical cancer, cervical polyps, severe cervical erosion, submucosal fibroids. Symptom 9: Spotting bleeding around the time of menstruation that lasts for several days, resulting in the entire menstrual period lasting 10 days or more. Possible causes: side effects of the placement of the birth control ring. Symptom 10: Postmenopausal vaginal bleeding that is minimal and lasts for 2-3 days. Possible causes: Bleeding due to shedding of the endometrium after menopause, bleeding from senile vaginitis. Symptom 11: Postmenopausal vaginal bleeding that is relatively heavy, persistent or recurrent. Possible causes: Endometrial cancer (the longer the bleeding is from menopause, the more likely it is malignant, for example, bleeding that occurs 5 years after menopause is much more dangerous than bleeding that occurs 6 months after menopause). Symptom 12: Intermittent discharge of blood from the vagina, sometimes accompanied by a very unpleasant odor. Possible cause: Fallopian tube cancer.