After menstruation, there is blood in the leukorrhea, there may be the following reasons: 1, the menstruation is not completely clean, this case does not need any treatment, just wait for a few days after the menstruation will be clean. 2, cervical related diseases, such as cervical inflammation, cervical polyps and so on, will appear after menstruation, blood, and a small number of cases need to be treated. 3, inflammatory diseases, including the cervical inflammation mentioned above, as well as the endometrium Inflammatory diseases, such as cervical inflammation, endometrial polyps, etc., can also lead to poor repair of the endometrium after menstruation, resulting in dribbling of menstruation and blood in the leukorrhea.4. Endocrine disorders require further gynecological endocrine examination to rule out endocrine problems before making a correct diagnosis.