In a meta-analysis, a team of Australian researchers found that upper abdominal pain, GERD, diarrhea, chest pain or heartburn, vomiting, retching, and incomplete evacuation appeared to be gastrointestinal (GI) symptoms that are significantly associated with increasing BMI and obesity. In addition, a number of other GI symptoms had no relationship with obesity, including lower abdominal pain, bloating, constipation or hard stools, nausea, anal blockage, and fecal incontinence. The authors noted that a greater knowledge of the GI symptoms associated with obesity could be important when managing these patients.

Abstract: Obesity Reviews, May 2012.