When a woman bleeds during her first sexual intercourse, it is caused by the rupture of the hymen, and if the hymen is completely ruptured, bleeding will not occur during the second sexual intercourse. But there are special circumstances, because some women hymen thicker and more toughness, in the first sex due to the action range of small reasons, so that the hymen is not completely ruptured, bleeding less, etc., in the second sex hymen completely ruptured, may also occur a small amount of bleeding, this situation is also normal. Hymen is a membranous tissue covering the vaginal opening, distributed with capillaries and nerves, so when the hymen ruptures, there will be different degrees of pain and bleeding. It is recommended that after the hymen rupture, it is best not to have sex continuously, and it is best to allow a few days for the hymen crack to heal, and at the same time pay attention to sexual hygiene.