In the case of adolescent girls around the age of 10-14 years, the appearance of pain during menstruation without the arrival of menstrual blood is mostly due to menstrual disorders, primary dysmenorrhea caused by the clinical manifestations. If it is a woman of childbearing age, the phenomenon of delayed menstruation and abdominal pain does not exclude the possibility of early pregnancy. Other patients suffer from gynecological inflammatory diseases, endometriosis, uterine fibroids and other organic diseases, caused by premenstrual pain. Patients may choose to go to the hospital for sex hormone test, uterine and ovarian ultrasound, gynecological internal examination. If necessary, hysteroscopy or uterine laparoscopy will be performed to clarify the diagnosis of the disease, and treatment will be based on the results of the examination.