Vaginal bleeding is commonly caused by the following reasons: first, bleeding due to endocrine disorders. The second is bleeding due to organic uterine pathology, such as submucosal fibroids, endometriosis, endometrial inflammation or endometrial polyps, which may cause bleeding. In addition, cervical lesions, such as cervical polyps or cervical cancer, can also cause vaginal bleeding in clinical practice. Endometrial lesions such as endometrial cancer and endometrial atypical hyperplasia can also lead to vaginal bleeding. Therefore, once irregular vaginal bleeding is detected, you must go to the hospital for detailed examination. Routine blood test, gynecological examination, ultrasound examination and cervical cancer screening are recommended, and intervention and treatment must be given according to the results in clinical practice.