There are many reasons why menstruation is not clean after 20 days, which may be related to anovulatory dysfunctional uterine bleeding, placement of birth control devices, gynecological diseases and blood diseases.
1. Anovulatory dysfunctional uterine bleeding: menstrual cycle disorders, menstrual period length varies, menstrual flow is high or low, which is a manifestation of anovulatory uterine bleeding.
2. Placement of birth control device: birth control device is a foreign body to the uterine cavity, which may lead to aseptic inflammation in the uterine cavity, cause endometrial blood vessel rupture and bleeding, and cause prolonged menstruation.
3. Gynecological diseases: such as pelvic inflammatory disease, endometrial polyps, endometritis, endometriosis, uterine fibroids, etc. may lead to poor blood circulation in the uterus, pelvic stagnation, etc., which may also lead to excessive menstruation and prolonged menstruation.
4. Blood diseases: including thrombocytopenic purpura and aplastic anemia may trigger severe uterine bleeding and prolonged periods. Chronic anemia, chronic hepatitis and cirrhosis may also lead to uterine bleeding and prolonged periods.
There may also be other reasons for not having a clean period for 20 days, so it is recommended to seek medical advice, improve relevant examinations and actively deal with the problem under the guidance of specialists.