Most vaginal bleeding after the first intercourse will disappear on its own after a day or so, and will not last more than two days at most. Because the first time intercourse bleeding is caused by the rupture of the hymen, the hymen does not have large blood vessels and the local blood circulation is not rich, so there will not be a lot of bleeding. If the bleeding after the first intercourse is large and lasts for a long time, it is necessary to consult a specialist in time to clarify whether there is a cervical tear and to treat it in a timely manner. Cervical erosion, cervical polyps or other genital diseases can cause bleeding after intercourse. If a woman bleeds for a long time after the first intercourse, she needs to undergo gynecological examination, colposcopy and ultrasound examination of the uterine appendages to clarify and actively treat the problem, so as to avoid excessive bleeding that may lead to anemia.