Not Medical Advice: Abdominal bloating is a condition in which the abdomen feels full and tight. It may look swollen (distended).
Common causes include:
Swallowing air
Constipation
Gastroesophageal reflux (GERD)
Irritable bowel syndrome
Lactose intolerance and problems digesting other foods
Overeating
Small bowel bacterial overgrowth
Weight gain
Oral diabetes medicine, acarbose, and medicines or foods containing lactulose or sorbitol, may also cause bloating.
Abdominal bloating can also be a symptom of several serious conditions. More serious disorders that may cause bloating are:
Ascites and tumors
Celiac disease
Dumping syndrome
Ovarian cancer
Problems with the pancreas not producing enough digestive enzymes (pancreatic insufficiency)
10 Flat Belly Tips: Find out How to Beat Bloating from WebMD.