Small abdominal swelling and pain but no menstruation may be caused by pregnancy, pelvic stasis, chronic endometritis, uterine fibroids, endometriosis, adnexitis, ectopic pregnancy, ruptured pelvic tumor and other factors, which need to be judged comprehensively according to the signs and examination results and treated promptly. Common causes and treatment I. Physiological factors Women who have recently had sex need to pay attention to whether they are pregnant when their menstruation is delayed, they will stop menstruating after pregnancy and may have slight abdominal pain in the early stage, early pregnancy test paper can be used for initial speculation, blood HCG and vaginal ultrasound can confirm the diagnosis. Pathological factors 1, pelvic stasis: some women have endocrine disorders, accompanied by pelvic stasis, before menstruation, there will be small abdominal swelling and pain performance, can help diagnose through ultrasound pelvic venous blood flow detection, if the symptoms are relatively mild, can be treated without special, pay attention to personal hygiene can be, if the symptoms are more serious, can follow medical advice for drug or surgical treatment to relieve symptoms; 2, fibroids. Uterine fibroids can lead to abdominal distension and pain, delayed menstruation and other symptoms. Symptoms, inhibit the growth of the lining, such as oral short-acting contraceptives, etc., the emergence of adnexal mass, infertility, pain can not be relieved, consider surgery; 4, adnexitis: adnexa refers to the female ovaries, fallopian tubes, pathogens into the reproductive tract caused by the inflammation of the two, for adnexitis, manifested as abdominal distension, abnormal leucorrhea, etc.. If the symptoms are serious, intravenous anti-infection treatment can be given; 5, ectopic pregnancy: the fertilized egg does not enter the uterine cavity, but stays in the fallopian tube, the cervical opening, etc. As the fertilized egg increases in size, it causes abdominal distension and pain, but menstruation does not come, which is a dangerous situation. If the diagnosis is confirmed, timely surgery and other treatments are needed; 6, pelvic tumor rupture: pelvic organs, such as bladder, ovary, intestinal tumors, with the development of the disease, the tumor increases until rupture, which leads to abdominal distension and pain, need to seek medical attention in a timely manner, after the doctor’s diagnosis of surgical treatment; 7, other: abortion surgery or uterus removal surgery can lead to cervical adhesion, small abdominal distension and pain but no menstruation. The abdomen is swollen and painful, but the menstruation does not come. In addition, a variety of gynecological diseases can lead to such symptoms, it is recommended to seek medical attention in a timely manner, according to the cause of treatment. If you have symptoms such as delayed menstruation and abdominal pain, it is recommended that you seek medical attention to clarify the cause so as not to delay treatment.