If there is a small amount of blood in the discharge after intercourse, it can be observed once in a while. If there is blood after intercourse several times, it may be caused by cervical erosion or cervical lesions, which may require further cervical smear, TCT and HPV examination, and colposcopy if necessary to rule out cervical diseases. In addition, endometrial polyps, cervical canal polyps or even submucosal fibroids may also cause blood after intercourse, which usually requires ultrasound and gynecologic examination. If ovulatory bleeding may also cause, just after intercourse with blood symptoms, usually need to come over when there is blood to do ultrasound examination, blood test endocrine six, clear diagnosis under the guidance of the doctor after treatment.