When a woman has sex for the first time, it often leads to bleeding of the hymen, causing bleeding, and the vast majority will not bleed again when they have sex later. However, if vaginal bleeding occurs after the first sexual intercourse, it is likely that the original laceration is relatively deep and small scabs have formed in the area. When the scab is not completely healed, intercourse will cause damage to the mucous membrane of the scab and bleeding will occur again. It is not necessary to be nervous about this situation, as long as the amount of bleeding is not too much, keep the vulva clean and avoid pathogenic infections. In addition, the vast majority of women will bleed during the first sexual intercourse, but some may not bleed during the first sexual intercourse, mainly because the hymen hole is relatively large and does not cause damage to the hymen, so it will not bleed.