Management of Bloating and Fullness

Initial Assessment and Diagnostic Approach

The American Gastroenterological Association recommends beginning with a targeted clinical history focusing on alarm features, then implementing dietary modifications as first-line therapy, reserving diagnostic testing exclusively for patients with red flags, and considering central neuromodulators or brain-gut behavioral therapies when symptoms persist despite dietary intervention 1, 2
The evaluation should identify specific alarm features that mandate immediate investigation, such as unintentional weight loss, which suggests malabsorption, malignancy, or serious underlying disease requiring urgent workup 3, 4
Gastrointestinal bleeding, persistent or severe vomiting, iron-deficiency anemia, and family history of inflammatory bowel disease or colorectal cancer are also alarm features that require immediate attention 3, 4, 5
Assessing the relationship to meals and specific foods, such as lactose, fructose, or gluten, can help identify potential dietary triggers 4
Evaluating stool patterns using the Bristol Stool Scale can help identify constipation, diarrhea, or alternating patterns suggesting IBS 4

The American Gastroenterological Association recommends reserving abdominal imaging and upper endoscopy exclusively for patients with alarm features, recent worsening symptoms, or abnormal physical examination findings 1, 2, 3, 5
Serologic testing for celiac disease with tissue transglutaminase IgA and total IgA levels should be ordered in patients with bloating, particularly those with diarrhea or weight loss 3, 4
Complete blood count and comprehensive metabolic profile are only recommended when alarm symptoms are present or systemic disease is suspected 4
Fecal elastase may be considered in patients with bloating and pain despite adequate pancreatic enzyme replacement 4

Dietary modifications should be implemented for 3-4 weeks before considering other interventions 5
A low-FODMAP diet may be considered for suspected carbohydrate intolerance 5, 4
Gluten and fructan restriction may be recommended for patients with self-reported gluten sensitivity 4
A gastroenterology dietitian consultation is recommended when dietary modifications are needed to avoid malnutrition from prolonged restrictions 1, 2, 3, 5, 4
Central neuromodulators, such as antidepressants, can reduce visceral hypersensitivity, raise sensation threshold, and improve psychological comorbidities 1, 2, 5
Secretagogues, such as linaclotide and lubiprostone, show superiority over placebo for abdominal bloating in constipation 4
Rifaximin, a non-absorbable antibiotic, is effective for SIBO-related bloating 4
Prokinetic agents are first-line therapy for gastroparesis-related symptoms 5
Probiotics should not be used to treat abdominal bloating and distention 1

Psychological therapies, such as hypnotherapy, cognitive behavioral therapy, and other brain-gut behavior therapies, may be used to treat patients with bloating and distention 1, 2
Biofeedback therapy may be effective for bloating and distention when a pelvic floor disorder is identified 1
Diaphragmatic breathing and central neuromodulators are used to treat abdominophrenic dyssynergia 1
An integrated care approach that addresses gastrointestinal symptoms with nutrition and brain-gut behavior therapies is considered the gold standard 6, 7

Psychological comorbidity is more important for long-term quality of life than gastrointestinal symptoms alone 6, 7
Up to one-third of people with IBS also experience anxiety or depression, and these conditions frequently coexist with bloating symptoms 6, 7
An integrated care model that includes medical management, dietary modifications, and psychological therapy delivered by a multidisciplinary team should be considered when managing patients with bloating and co-occurring anxiety or depression 6, 7