Aunt substitute refers to menstruation, women menstruation stomach bloating consider is dysmenorrhea, uterine fibroids, chronic pelvic inflammatory disease, etc.. 1. Dysmenorrhea: the endometrial prostaglandin content will increase when women have menstruation, which will cause uterine smooth muscle over-contraction, vascular spasm, and uterine ischemia and hypoxia, resulting in dysmenorrhea, which is mainly manifested as lower abdominal pain, swelling, accompanied by lumbar pain and so on. 2. Uterine fibroids: uterine fibroids are composed of smooth muscle and connective tissue, and when the fibroids are large, they will compress the rectum, which will also cause lower abdominal pain and swelling, lumbago and back pain, and the symptoms will be more serious during menstruation. 3. Chronic Pelvic Inflammatory Disease: Chronic pelvic inflammatory disease is related to pathogen infection, which may be exogenous or endogenous, and the patient will have lower abdominal distension, and the symptom will be aggravated during menstruation. If the bloating is severe during menstruation, it is recommended to consult a doctor in time to identify the cause of the disease and choose the appropriate treatment. It is recommended to pay attention to keep the abdomen warm and pay attention to personal hygiene.