The dark color of the blood in the week after intercourse for two consecutive months is considered to be related to too much violence in sexual life, cervical erosion, cervical lesions, cervical polyps and so on. 1. Sexual life is too violent: if the man in the sexual life is too violent, it is easy to damage the blood vessels of the vaginal mucosa, and then there will be a vaginal bleeding and other clinical symptoms, usually lasts for about 1 week the amount of bleeding will gradually reduce. 2. Cervical erosion: If a woman has cervical erosion, the cervical columnar epithelium is displaced and turned out, and the columnar epithelium is rich in blood vessels, so it is easy to cause local bleeding due to localized contact during sex. 3. Cervical lesions: If a woman has low-grade or high-grade squamous intraepithelial neoplasia, she will have a small amount of dark-colored vaginal bleeding after sex as the main clinical manifestation of contact bleeding. 4. Cervical polyps: If a woman has cervical polyps, because the polyps are a kind of vascular occupying lesion, so the woman will also have a small amount of vaginal bleeding after sex. For two consecutive months after coitus, a week of dark-colored bleeding for women, it is recommended that they go to a regular hospital gynecology consultation, improve ultrasound, cervical cancer screening and other related examinations, to clarify the cause of the cause of the disease under the guidance of the doctor to actively treat.