The reason for not getting menstrual flow is more, common may be early pregnancy, uterine adhesions and other reasons, if these situations, handling measures are not the same. 1, early pregnancy: if pregnancy occurs, there will be no menstrual flow, early pregnancy will also be due to congestion of the reproductive tract and pelvic organs, the tension of the uterine muscle layer increases, so that the situation of small stomach swelling, this situation is recommended to go to the hospital in a timely manner This is the case, we suggest to go to the hospital to check the blood chorionic gonadotropin and ultrasound to make a clear diagnosis; 2. Uterine adhesions: Uterine adhesions include cervical adhesions or uterine cavity adhesions, both of which can cause menstrual blood to remain in the uterine cavity, resulting in a bloated belly and menstruation. In addition, previous history of abortion, history of uterine clearance surgery should be highly alert to the possibility of uterine adhesions; 3, endocrine disorders: polycystic ovary syndrome or other factors leading to endocrine disorders, can lead to delayed menstruation, this time to check the urine pregnancy test is negative, combined with B ultrasound, sex hormone six tests can help clarify the cause.