After the end of menstruation and then a small amount of bleeding, caused by more reasons. First, there are physiological reasons, for example, when ovulation, after two estrogen peak, will stimulate the uterine lining and cause a small amount of bleeding, will end in 3-7 days, if it is once in a while, you can observe, will not affect the health. Second, for example, the existence of gynecological diseases, when there are endocrine hormone abnormalities, including ovarian cysts, ovarian hypogonadism, can cause bleeding after the end of menstruation. Third, when there are gynecological diseases such as uterine fibroids, submucosal fibroids, endometrial polyps, cervical polyps, and even pre-cancerous lesions, it can also cause abnormal bleeding. Be sure to go to the hospital for ultrasound examination, including TCT and HPV cancer screening, to rule out the existence of such factors, according to the situation to be symptomatic treatment, to avoid affecting the health of the body.