If there is always irregular vaginal bleeding, it is clinically common for the following reasons: First, trichomoniasis. When trichomoniasis occurs, there are a lot of bleeding spots in the vaginal mucosa, so it can lead to capillary rupture causing bleeding, and it is recommended to actively treat vaginal inflammation in the clinic. Secondly, caused by local lesions of the cervix, such as cervical polyps or cervical cancer, a small amount of vaginal bleeding may also occur clinically. Thirdly, endometrial lesions, endometritis, endometrial polyps and endometrial cancer may cause irregular vaginal bleeding. Fourthly, pelvic tumor and endometriosis can cause vaginal bleeding. It is recommended to do routine blood test, gynecological examination, routine white belt test, cervical cancer screening and ultrasound examination, and then give appropriate treatment.