The menstrual period of up to 8 days still have a small amount of bleeding, is the performance of menstrual dribbling, causes menstrual dribbling mainly include: 1, ovarian endocrine dysfunction, progesterone level is insufficient or the withdrawal of progesterone is incomplete, resulting in incomplete stripping of the uterus endometrium, so that menstrual blood dribbling. 2, suffering from gynecological organisms, such as endometrial polyps or submucosal uterine fibroid, as a result of these lesions itself If you have endometritis, the endometrium will not recover well, and there will be fewer traumas that will continue to bleed again and again, which will lead to menstrual bleeding. 4. If you have birth control placed in the uterine cavity, it may lead to prolongation of menstrual period due to the influence of uterine contraction, or due to the local aseptic inflammation, which affects the repair of endometrium, making the menstrual bleeding incomplete. 5. Repair, so that the menstrual drenching.