The abdominal distension but not pain may be physiological, such as premenstrual period or ovulation can have a slightly distended feeling in the lower abdomen, and some pathological, such as gynecological inflammation, intestinal inflammation, etc., need to be clearly diagnosed, and then further treatment. 1, gynecological inflammation: such as tubal inflammation and pelvic inflammatory disease, mainly manifested as abdominal pain, abdominal distension, but some patients can only manifest lower abdominal distension, accompanied by increased vaginal discharge, lumbosacral pain and other symptoms. It is recommended to go to the hospital for ultrasound or color ultrasound examination and treat with penicillin or cephalosporins after clear diagnosis. 2. Intestinal diseases: including intestinal dysfunction and intestinal lesions are two possibilities. Intestinal dysfunction is due to the dysbiosis of intestinal digestion, absorption function is weakened, the body’s food can not be digested in time, it will accumulate in the abdomen bloating phenomenon, this situation can take some probiotics to regulate the intestinal tract. Intestinal diseases, including chronic colitis, colon polyps, colon tumors, etc., can be manifested as abdominal distension, and it is recommended to go to the hospital in time for colonoscopy, and according to the results of the examination, drug or surgical treatment.