Vaginal bleeding after menstruation is commonly caused by the following reasons: 1) due to endocrine disorders, estrogen deficiency. 2) due to coagulation disorders, thrombocytopenia resulting in vaginal bleeding again. 3) due to inflammation of the endometrium. 4) endometrial polyps. 5) submucosal fibroids. 6) endometriosis. 7) pelvic inflammation. 8) pelvic tumors. 9) due to cervical disease Bleeding caused by cervical disease. Therefore, for the situation of vaginal bleeding again after menstruation, clinical attention should be paid to it, and gynecological examination must be done to find out whether there are bulky organisms in the vagina and cervix locally, and to find out whether the endometrium is abnormally thickened and has abnormal echoes. Depending on the results of the examination, the necessary clinical interventions should be made.