If it is time to come to menstruation, there is no menstrual blood flow but there is brown discharge. Firstly, if there is a history of sexual intercourse, the possibility of ectopic pregnancy must be ruled out and it is recommended to collect morning urine for an early pregnancy test. Secondly, if pregnancy is ruled out, clinically it is likely to be caused by endocrine disorder. It is suggested that blood can be drawn for sex hormone six test to understand the endocrine situation. If there is brown discharge and pain in the lower abdomen, it is often caused by inflammation of the pelvis. It is recommended that a gynecological examination be done to find out whether there is pressure and pain in the uterine adnexa, and anti-inflammatory treatment should be actively given clinically. Again, endometriosis is also seen as a possibility, and irregular vaginal bleeding is also seen clinically, so ultrasound examination is recommended.