There are more reasons why menstruation does not stop for 20 days, such as: endocrine disorders, preeclampsia, ectopic pregnancy, gynecological tumors, etc. It is recommended to use medication and surgery if necessary. 1. Endocrine disorders: it is recommended to use appropriate medication under the guidance of a doctor, such as: estradiol valerate tablets, medroxyprogesterone tablets, etc., or the use of scraping for hemostasis treatment. 2. Pre-eclampsia: do ultrasound to check whether the embryo has stopped developing, after the embryo stops developing, it is necessary to clear the uterus in time, and if necessary, it is also necessary to take metronidazole, amoxicillin capsules and other medications for anti-infection treatment; those who have not stopped developing are recommended to use medications to preserve the fetus, such as: Fetus-preserving spirit, methylhydroxyprogesterone tablets, and so on. 3. Ectopic pregnancy: generally need to choose laparoscopic surgery. 4. Gynecological tumors: suffering from uterine fibroids, endometrial cancer, cervical cancer, etc., most of them will be treated with hemostatic drugs such as Anluo Blood, Gynecological Hemostatic Spirit, etc., and if necessary, surgery will be chosen for treatment. If the menstruation has not stopped for 20 days, it is recommended to go to the hospital in time to have the relevant items examined, and according to the specific situation, take corresponding treatment measures. The specific use of drugs need to consult a professional physician.