The presence of blood all the time after menstruation needs to be considered as abnormal vaginal bleeding or uterine bleeding. It is more normal if there is blood just after menstruation because some of the blood may remain in the vaginal wrinkles and in the uterine cavity, so there will be blood mixed in the leucorrhea to appear as blood. If the blood is still there after a few days, it is considered to be caused by reproductive system diseases, including those caused by reproductive system infections, such as vaginitis, cervicitis and cervical erosion. As a result of reproductive system tumors, such as contact bleeding in patients with cervical cancer, seen in abnormal uterine bleeding due to endometrial tumors after having sex, uterine fibroids, uterine polyps, cervical polyps, and thus bleeding, it is recommended to go to the hospital in time to improve the relevant examination and clarify the specific cause.