The reasons why a woman does not bleed but is in pain during her first sexual intercourse are as follows: 1. It may be due to the fact that the woman’s hymen has been affected by trauma before and has ruptured long ago but the vaginal opening is tight, thus also causing pain. 2. It may also be that the hymen is intact but thicker and does not bleed if no laceration occurs, but there is pain. The pain occurs mainly due to the tightness of the woman’s vagina and the pain caused by friction. It is important for women to stay relaxed after their first sexual intercourse and to wash their vulva to avoid infection. If there is a lot of bleeding or pain after sex, you need to go to the hospital in time to check and deal with it, so that the vulva and vagina will not be overly congested and affect women’s health.