Bloating in the abdomen may be caused by intestinal obstruction, indigestion, pelvic inflammatory disease and prostate enlargement. 1. Intestinal obstruction: the typical symptom of intestinal obstruction is abdominal pain and bloating. With the accumulation of intestinal contents, the pressure in the intestines increases, resulting in abdominal pain and bloating, accompanied by nausea and vomiting. 2. Dyspepsia: When patients suffer from dyspepsia, a large amount of food will accumulate in the intestinal lumen, leading to abdominal distension. 3. Pelvic inflammatory disease: Pelvic inflammatory disease will stimulate the pelvic organs, leading to abnormal intestinal peristalsis, which will cause abdominal distension. 4. Prostatic hyperplasia: when prostatic hyperplasia leads to acute urinary retention episodes, the urine in the bladder can not pass through the prostate into the urethra to be discharged out of the body, and when acute urinary retention occurs, it will lead to lower abdominal distension. Symptoms of bloating in the lower abdomen, should go to the hospital in time to cooperate with the doctor to confirm the diagnosis, and then symptomatic treatment.