The reasons for bleeding again 1 week after menstruation are as follows: 1, ovulation bleeding, as women have ovulation, small fluctuations in the level of hormones in the body will lead to endometrial exfoliation, in the exfoliation after discharge to the vulva will be presented as a small amount of blood present, 1-2 days will disappear; 2, women suffering from chronic cervical inflammation, such as cervical erosion, cervical polyps and other conditions will also lead to bleeding; 3, when women suffer from uterine fibroids, endometrial polyps and other diseases will affect the contraction of the uterus, which will also lead to the occurrence of uterine bleeding; 4, when women suffer from endocrine disorders, such as dysfunctional uterine bleeding will also occur irregular menstrual cycle and vaginal bleeding. Therefore, women need to go to the hospital for gynecological ultrasound and physical examination in time to clarify the site of bleeding and then give symptomatic treatment.