If menstruation occurs once every ten days or so without taking birth control pills, the following diseases should be ruled out: firstly, menstruation caused by blood diseases, such as thrombocytopenia, aplastic anemia, or coagulation dysfunction, all of which may lead to frequent menstruation. Secondly, the frequent menstruation caused by organic lesions, such as endometrial problems, endometrial cancer or endometrial polyps, can also lead to frequent menstruation, and clinically, the following examinations are needed: 1) routine blood test; 2) gynecological examination; 3) clinical ultrasound examination; through the above examinations, a preliminary diagnosis can be made, and if necessary, diagnostic scraping is also needed. If necessary, diagnostic scraping is also needed.