Girl Bleeding Having Sex - Learn more about the possible causes and treatments. Get a health care checkup right away if you have ongoing vaginal bleeding after sex. Other conditions that can cause vaginal bleeding after sex include: Endometrial precancer or cancer — This is precancer or cancer that starts in the uterus. Bleeding after sex can happen as a result of menstruation, vaginal dryness, inflammation, infection or Bleeding after sex, also called postcoital bleeding, occurs when there's bleeding from the lining of the vagina or cervix. Some girls will have a small amount of bleeding, especially if the opening into the vagina is small. It can be heavy or light, and can be caused by many common factors. For some The hymen can be stretched open long before you have sex for the first time. You may not notice you’re bleeding during sex. Many girls do not bleed the first time they have sex. The hymen is a very thin piece of skin-like tissue that partly covers the opening of the vagina. fnv, uol, wbs, sdu, inl, psf, cri, jzx, itm, dnj, lsl, rhf, sio, cic, sty,