Vaginal bleeding refers to non-normal menstrual bleeding, usually from the vulva, vagina, cervix and uterus, and is a common symptom in women and a common manifestation of various diseases of the female reproductive system. Most of them are some benign lesions, but they are also signs of some malignant diseases, so they should not be taken lightly. Once vaginal bleeding occurs, you should seek medical attention in time to avoid delaying treatment. The symptoms of vaginal bleeding can be broadly classified into the following types: 1. Increased menstrual flow, prolonged periods but normal cycles. Most likely endometrial polyps, uterine fibroids, myometrium, gonorrhea, and downward position of birth control ring. 2. Irregular vaginal bleeding in the menstrual cycle. It is often due to ovarian endocrine dysfunction resulting in dysfunctional uterine bleeding, mostly seen in adolescent and perimenopausal women. In severe cases, it may lead to haemorrhage, resulting in anaemia and even life-threatening. 3. Vaginal bleeding after menopause is mostly seen in senile vaginitis and endometritis, but should be alert to the possibility of malignant tumors, such as endometrial cancer, cervical cancer, uterine sarcoma, etc. Therefore, timely consultation and examination should be carried out to avoid delay in diagnosis and treatment. 4. Irregular bleeding after menopause. Women of childbearing age are more likely to consider pregnancy-related diseases, such as pre-eclampsia, ectopic pregnancy, gravida, etc.; 5. Bleeding after sexual intercourse. Mostly cervical erosion, cervical polyp, endometritis, endometrial polyp, cervical cancer or submucosal fibroid. 6. Vaginal bleeding with abnormal leucorrhea. Mostly considered as advanced cervical cancer, endometrial cancer with infection. 7. Long-term persistent vaginal bleeding. Most of them are malignant tumors of reproductive organs, such as cervical cancer, endometrial cancer, choriocarcinoma, etc. 8. Intermenstrual bleeding. It occurs between two menstrual periods, lasts 3-4 days and the amount of blood is very small, it is mostly ovulatory bleeding, which is a physiological phenomenon. If it occurs every month, and the amount is large and lasts for a long time, it does not exclude endometrial polyps, hysteritis and endometritis. 9. Pre- and post-menstrual spotting bleeding. A small amount of bloody discharge before or a few days after the onset of menstruation, usually due to abnormal ovarian function, or with a birth control device. 10, after the menstruation is pushed back, even for a day or two, a small amount of vaginal bleeding, do not think that this is definitely late menstruation, as long as the amount and time is different from the usual menstruation should be alert to the possibility of ectopic pregnancy or pre-eclampsia abortion, timely consultation is necessary. 11, taking emergency contraceptive pills can also occur vaginal bleeding, especially repeated users will lead to menstrual disorders, bleeding, dripping. Therefore, it can only be used as a remedy and cannot replace normal contraceptive methods. It should also be noted that some women abuse hormone-containing “health products”, “breast enlargement pills”, “creams”, etc., which can also have an effect on menstruation. 12.Generally, vaginal bleeding will stop about 3 to 7 days after abortion or natural abortion, but the bleeding time of drug abortion is slightly longer. If there is no special condition and the vaginal bleeding time is prolonged, after excluding intraoperative damage, cervical inflammation and other conditions, it is likely that there is residual in the uterus, so you should consult a doctor in time and clear the uterus if necessary. 13.Women who have suffered from chylothorax before and have incessant vaginal bleeding again after regular treatment may have malignant chylothorax or choriocarcinoma, so they should consult a doctor immediately.