The reasons for the absence of menstruation and pain in the abdomen are: First, it may be that women experience pain in the abdomen due to the occurrence of qi stagnation and blood stasis or tight cervical opening, and the endometrium exfoliated in the uterine cavity is not able to be excreted smoothly through the cervical opening. Second, it may also be that women consume unclean food or too cold food to appear abdominal pain. Third, when a woman is pregnant and has a pre-eclampsia, she will also have menstrual failure and abdominal pain. When women have delayed menstruation, they need to go to the hospital to have blood tests for chorionic gonadotropin level and gynecological ultrasound, eat more digestible food, and if the ultrasound is done and the endometrium is thick, progesterone can be given to induce menstruation if necessary.