Joshua Watson, MD, is board-certified in gastroenterology, hepatology and internal medicine. Practicing at Novant Health Lowcountry Gastroenterology in Mount Pleasant, he focuses on collaborative care for GI conditions including IBS, IBD, GERD and colon cancer prevention.

Irritable Bowel Syndrome (IBS) symptoms - gas, abdominal pain, bloating, constipation and diarrhea - can significantly affect a patient’s quality of life. Bloating may occur as part of IBS or reflect other underlying causes that warrant further evaluation. While many patients with IBS or bloating can be managed in the primary care setting, alarm features or refractory, atypical or progressive symptoms should prompt referral to gastroenterology. In this Q&A, Dr. Watson addresses the red flags that signal it’s time for a referral and shares tips for coordinated care.

When should referring clinicians manage IBS/bloating in office versus making a referral to a gastroenterology (GI) specialist?

IBS does not require an exhaustive work-up in every patient. Primary care physicians can begin treatment confidently if a patient has a typical chronic pattern of abdominal pain related to changes in bowel habits with no alarm features.

For bloating, it is helpful to clarify whether a patient feels bloated or has progressive, visible abdominal distension. Constipation, dietary triggers, and incomplete evacuation of stool can be common contributors. A referral is most helpful when symptoms are refractory to conservative management, atypical, progressive, severe, or associated with alarm symptoms.

Are advancements in IBS treatments changing referral patterns?

Advances aren’t necessarily changing recommendations for referrals. Many patients with uncomplicated IBS can be managed effectively through their primary care physicians.

For those patients who do not respond well to first-line treatments, gastroenterologists can better individualize care and look for other potential underlying causes with more targeted options. In these patients we may look for things like bile acid diarrhea, pelvic floor dysfunction, pancreatic insufficiency, microscopic colitis, sucrase-isomaltase deficiency or other etiologies. We may also consider prescription therapies based on IBS subtype, dietitian -guided dietary treatment, gut-directed behavioral therapies, neuromodulators or other therapies.

When should primary care clinicians refer IBS patients to a GI specialist?

A referral for a GI evaluation should be considered when:

• Alarm features are present (see red flags below).
• Symptoms are refractory to first-line treatments.
• Diagnostic uncertainty remains despite appropriate workup.
• There’s a strong family history of inflammatory bowel disease, celiac disease or GI malignancies.

For patients experiencing bloating, signs of persistent or progressive visible abdominal distension, persistent vomiting, early satiety, and palpable masses should prompt further evaluation.

Which red flags should prompt an urgent or expedited referral to a GI specialist?

Red flags or alarm symptoms include:

• A palpable abdominal or rectal mass
• Fever or evidence of systemic inflammation
• Iron deficiency anemia
• Marked abdominal distension
• New or rapidly progressive bowel symptoms in an older adult
• Overt blood in the stool or melena
• Persistent nocturnal diarrhea or pain
• Persistent vomiting
• Progressive dysphagia
• Unintentional weight loss

What age or symptom-related thresholds should trigger a referral?

Age alone does not rule out IBS, but new GI symptoms later in life warrant closer attention. Patients over 45 who are not up to date on their colorectal cancer screening should be referred. Older adults with chronic watery diarrhea, especially in women, should raise the possibility of microscopic colitis and trigger a referral.

What pre-referral workup helps your team move more quickly toward a diagnosis and care plan?

It is helpful to get documentation of a completed workup and interventions that have already been tried.

For diarrhea-predominant symptoms, an initial workup might include a complete blood count, celiac serologies and inflammatory markers such as C-reactive protein or fecal calprotectin.

Stool testing is appropriate when there is an exposure history, acute onset, recent antibiotic use, travel, immunocompromise or other concern for infection.

More specialized tests - such as breath testing, motility studies, anorectal manometry or repeat advanced imaging - are usually best selected by the gastroenterologist.

In addition, the most useful referral note often includes symptom pattern, prior treatment response, presence of alarm symptoms, family history, prior surgeries and an up-to-date medication list.

How can referring physicians encourage hesitant patients to see a gastroenterologist?

The purpose of a referral to a gastroenterologist is not only about ruling out serious disease, but to help find the root cause of their symptoms so they can feel better and regain function. Seeing a gastroenterologist does not automatically mean they need an upper endoscopy or colonoscopy. A specialist can validate that their symptoms are real and disruptive while helping to determine the etiology and find solutions.

Once a patient arrives at your clinic, what does the initial evaluation typically involve?

The initial visit starts with a detailed review of symptom history, bowel pattern, diet, medication use, prior testing, family history and impact on daily activities. With my patients, I look to see if the presentation fits with irritable bowel syndrome, another disorder of gut-brain interaction or if there are clues to suggest an inflammatory bowel disease, malabsorptive process or motility issue.

From this history and review of records, we come up with a personalized diagnostic approach with targeted testing. Some patients may not need any further testing. Others might benefit from endoscopic evaluation, imaging, stool studies, blood work or other testing to help make an accurate diagnosis.

How do you handle care coordination?

My approach to care is collaborative. I strive to communicate the working diagnosis and plan with the referring provider. When necessary or helpful, I may involve a GI dietitian, pelvic floor physical therapist, or other specialists; however, the primary care physician remains central to continuity and management of the patient’s overall health.