If a 13-year-old girl’s menstruation does not stop, it can be caused by dysfunctional uterine bleeding, endocrine disorders and organic gynecological diseases, so you should find out the cause of the disease and apply medication or surgery under the guidance of your doctor. 1. Dysfunctional uterine bleeding: in this case, there will be no ovulation, and the diagnosis can be confirmed by abdominal ultrasound and hormone 6 tests, and if the uterine lining is not thick, ethinyl estradiol cyproterone tablets can be taken under the guidance of the doctor. 2. Endocrine disorders: women with endocrine disorders will suffer from different degrees of endocrine disorders, which will be manifested as non-stop menstruation, and can be treated with estrogen and progesterone under the guidance of a doctor. 3. Organic gynecological diseases: common uterine fibroids, endometrial polyps, etc. may also cause non-stop menstruation, it is necessary to go to the hospital for abdominal ultrasound examination to further confirm the diagnosis. Once diagnosed, it can be treated with surgery. There are many reasons why a 13 year old girl’s period may not stop, and if the cause cannot be determined, it is recommended that the child be taken to a specialized pediatric or gynecological hospital for treatment.