Women bleeding below, on the one hand, may be caused by endocrine disorders, on the other hand, may be caused by female reproductive system diseases, as follows: a. Endocrine disorders: mainly female body estrogen, progesterone, androgen, such hormone level secretion disorder, will lead to female vaginal bleeding, can be manifested as a small amount of bleeding after clean menstruation, or a prolonged period, menstrual dripping This can be manifested as a small amount of bleeding after menstruation, or prolonged periods, or menstrual dripping. Reproductive system diseases: Some women have cervical erosion, cervical polyps, endometrial polyps, uterine scar diverticulum, adenomyosis, fibroids and other diseases that can cause vaginal bleeding. If there is no problem with the ultrasound, endocrine testing is needed to make a clear diagnosis before giving treatment.