Vaginal bleeding after having sex two days before menstruation is most commonly caused by disorders of the endocrine system and vaginitis. As chronic cervicitis leads to localized erosion of the cervix, having sex, especially strenuous sex will stimulate the localization, thus leading to bleeding. Contact bleeding due to malignant tumors of the cervix, caused by diseases in the uterine cavity, such as uterine fibroids, endometrial tumors. More common are preeclampsia due to pregnancy, rupture of embryonic tissue and bleeding in the case of ectopic pregnancy, as well as rupture of the corpus luteum, which can lead to bleeding, most women will be accompanied by abdominal pain and discomfort, and a positive pregnancy test, mainly due to an increase in human chorionic gonadotropin in the blood.