If the bleeding after 10 days of menstruation depends on the color of the bleeding, if it is bright red blood, consider cervical lesions, because in the process of intercourse will contact the cervix, if there is acute cervicitis, small polyps on the cervix or the patient has cervical erosion, during intercourse may lead to the phenomenon of bleeding after intercourse and the bleeding is bright red. If the bleeding is dark red, you should suspect that the blood is coming from inside the uterine cavity. If the bleeding is after 10 days of menstruation, you should consider that it is ovulatory bleeding, which is caused by the fluctuation of hormone levels in women’s bodies during ovulation, and ovulatory bleeding usually clears up on its own in 2-3 days.