There are various causes of vaginal bleeding.
In the non-pregnant state of women of childbearing age, there can be physiological ovulatory bleeding and menstrual bleeding, or pathological irregular vaginal bleeding due to diseases such as fibroids, adenomyosis, functional uterine bleeding, vaginitis, endometriosis, and endometritis.
In women of childbearing age who are pregnant, vaginal bleeding may also be caused by preterm labor, preterm labor, miscarriage, placenta abruptio, placenta praevia, ectopic pregnancy, and prodromal labor.
Frequent irregular vaginal bleeding in women who are not of childbearing age and in women of childbearing age should be taken seriously and promptly seek medical attention to undergo tests to identify the specific cause of the bleeding.