If you don’t have a period but have pain in your abdomen, look for the possibility of dysmenorrhea in the past. If you do not have menstruation, that is, if you exclude this situation before or after menstruation, the first consideration is gastrointestinal dysfunction due to digestive malfunction. In general, the pain in the small abdomen, accompanied by constipation or diarrhea or alternating constipation and diarrhea, is mostly characterized by gastrointestinal disorders, mostly related to cold and flu or inflammatory infections, as well as eating undigested food or unclean food. In this case, first of all, pay attention to the diet, pay more attention to rest, and consider giving drugs to improve gastrointestinal dynamics and regulate intestinal function for symptomatic treatment. If the symptoms are not relieved, it is necessary to improve the abdominal ultrasound and routine urine examination to exclude the possibility of urinary tract infection or pelvic inflammatory disease. Since these two diseases can also cause pain in the small abdomen, it is necessary to exclude the diagnosis and provide symptomatic support treatment according to the results of the examination.