Pelvic effusion is clinically caused if it is due to chronic pelvic inflammatory disease, which in turn leads to local inflammation of the ovaries in the clinical setting. In this case, vaginal bleeding can occur and can lead to menstrual disorders. The main reason is that the cells of the ovaries are damaged, which will cause corresponding changes in endocrine secretion, and that is why vaginal bleeding or menstrual disorders can occur. In addition, in the case of pelvic effusion, vaginal bleeding may also be caused by inflammation of the endometrium. In addition, vaginal bleeding may also be caused by endometriosis or pelvic tumor. In this case, a gynecological examination should be done to understand the location of the bleeding and an ultrasound should be done to rule out the possibility of pelvic tumor and then treatment should be given according to the results.