The causes of vaginal bleeding are:

1. Ovarian endocrine dysfunction: the most common, called dysfunctional uterine bleeding in medicine and metrorrhagia in traditional Chinese medicine.

2. Vaginal bleeding caused by pregnancy-related diseases. Such as abortion, ectopic pregnancy, hydatidiform mole, postpartum placenta residue, uterine contraction and so on.

3. Inflammation of reproductive organs. Common are vulvar ulcer, vaginitis, cervical erosion, cervical polyp, endometritis and so on.

4. Gynecological tumors: hysteromyoma, such as vulvar cancer, vaginal cancer, cervical cancer, endometrial cancer, uterine sarcoma, ovarian cancer and choriocarcinoma.

5. Reproductive tract injury: laceration of vulva, laceration of vagina, laceration of hymen, etc.

6. Vaginal bleeding after placing intrauterine device.

7. Contraceptive pills or estrogen and progesterone can lead to vaginal bleeding if used improperly or taken improperly.

Guiding opinions:

Vaginal bleeding associated with systemic diseases. Sometimes vaginal bleeding is not caused by reproductive organs themselves, but by systemic diseases. Such as thrombocytopenic purpura, aplastic anemia, leukemia and hepatitis. All of them can cause vaginal bleeding due to coagulation dysfunction.

I don't know your specific situation now. If it's convenient for you, you can go directly to the hospital for relevant examination, make clear the cause and give symptomatic treatment.