Pink discharge two days before menstruation may be related to coitus. If a woman has cervical diseases, such as cervicitis, cervical polyps, cervical cancer, etc., these diseases may cause contact bleeding, which is mainly manifested as bleeding after sexual intercourse, and may lead to pink discharge before menstruation. In addition, if the process of coitus is rough, causing a break in the vaginal mucosa will also have a small amount of bleeding. But it may also have nothing to do with coitus, such as fertilized eggs in the uterine body cavity outside of the site of implantation and development, will cause local rupture, more common is the fallopian tube pregnancy, this situation is usually accompanied by pain on the side of the abdomen, there may also be a small amount of bleeding caused by coitus after implantation of the fertilized egg a priori miscarriage, manifested as a pinkish-colored secretion. Some women also show pink discharge during the pre-menstrual period due to a relatively small amount of bleeding. For these causes of pink discharge and coitus are not related. If there are more reasons for pink discharge two days before menstruation, you should go to the hospital in time to rule out abnormalities and actively deal with them if necessary.