Aunt, also known as menstruation, delayed menstruation with a vague pain in the abdomen may be caused by endocrine disorders, pregnancy, endometrial inflammation and other factors. 1. Endocrine disorders: may lead to delayed menstruation, if there is a slight pain in the abdomen, cramps and other symptoms, it may be the manifestation of the fast approaching menstruation. 2. Pregnancy: After pregnancy, women will show no menstruation, the hormone secretion in the body increases during this period, and the symptoms of hidden pain in the abdomen may also occur. 3. Inflammation of the uterine lining: it may cause adhesions in the uterine cavity, which may result in delayed menstruation or amenorrhea, accompanied by symptoms such as vague pain and swelling in the abdomen. In addition, it may be caused by other reasons. It is recommended that patients go to the hospital in time for relevant examinations to clarify the cause of the disease and then actively treat it, so as to avoid delaying the condition and causing adverse consequences.