What is a small amount of bleeding?

Not menstrual bleeding, may be ovulation hormone level fluctuations, estrogen decline, endometrial shedding caused by bleeding. Secondly, there may be some gynecological diseases caused, such as endometriosis, pelvic inflammatory disease, cervicitis, endometrial polyps, uterine fibroids and other diseases, there may be allergic purpura, leukemia and other diseases caused.