There are many causes of abdominal distension in women, including gynecological diseases, tumors, dysmenorrhea, gastrointestinal diseases and so on. 1. Gynecological diseases: gynecological diseases are common causes of abdominal distension, such as pelvic inflammatory disease, uterine fibroids, ovarian cysts, etc. It is necessary to ask carefully about the menstrual history, the basic situation of the band, and carry out the necessary gynecological examination and related tests to clarify the cause of the disease. 2. Tumor disease: If the performance of small abdominal swelling occurs repeatedly, accompanied by painful symptoms, abnormal menstruation, abdominal mass, body emaciation, etc., it is necessary to be alert to the possibility of malignant tumors, such as endometrial cancer, cervical cancer and so on. 3. Dysmenorrhea: when women experience abdominal swelling or pain during menstruation, it is a kind of dysmenorrhea. 4. Gastrointestinal diseases: common gastrointestinal diseases, such as chronic appendicitis, will present the symptom of right lower abdominal distension and pain; chronic colitis will also present the symptom of small abdominal distension. Clinically, when women have symptoms of abdominal distension, they should consult a doctor in time to identify the specific cause of the disease and carry out targeted treatment in a timely manner.