Abdominal Adhesions and SIBO: How Scar Tissue Causes Relapse and What Actually Helps

Abdominal adhesions are the root cause of SIBO that nobody talks about in the gastroenterologist's office. They don't show up reliably on imaging, they don't show up on breath tests, and most GIs receive almost no training in how to recognize or treat them. Meanwhile, estimates suggest that anywhere from 60% to 90% of people who have had abdominal or pelvic surgery develop some adhesion formation, and a meaningful subset of those people go on to develop motility problems, partial obstructions, and recurring SIBO that refuses to clear. If you've had multiple cycles of antimicrobials, you're doing everything right with prokinetics and diet, and SIBO still comes back -- the mechanical explanation may be adhesions physically altering how your small intestine moves. This guide explains what adhesions are, how they cause SIBO, and what actually helps.

What Adhesions Are (And Why They Form)

Adhesions are bands of internal scar tissue that form between organs that shouldn't be stuck together. They develop as part of the body's normal healing response after any insult to the abdominal or pelvic cavity -- surgery, infection, inflammation, endometriosis, or trauma. During healing, fibroblasts deposit collagen in and around the injured area, and if the inflammation is extensive or prolonged, that collagen can form bridges between adjacent organs or between an organ and the abdominal wall. Once formed, adhesions typically persist for life. They're not automatically problematic -- many people have asymptomatic adhesions -- but they can become a real issue when they restrict movement or create partial obstructions.

How Adhesions Cause SIBO

The connection between adhesions and SIBO is mechanical. Your small intestine is supposed to move freely in the abdominal cavity and propagate contractions smoothly along its length. When adhesions tether parts of the intestine to other organs or to the abdominal wall, those sections can't move normally. The migrating motor complex -- the housekeeping wave that sweeps bacteria out of the small intestine -- encounters resistance at the tethered points. Bacteria accumulate in the pockets upstream of the restriction. A partial obstruction forms, stool transit slows, and bacterial overgrowth becomes entrenched. Even if you clear the SIBO with antimicrobials, the mechanical problem remains, and the bacteria simply come back.

Adhesions can also create subtle kinking of the small intestine that doesn't rise to the level of a full obstruction but still impairs motility. These sub-obstructive patterns are often missed on CT scans (which look for full obstructions) and rarely diagnosed unless a surgeon specifically goes looking during a laparoscopy. Patients with classic adhesion-driven SIBO often describe a pattern of worsening symptoms with certain body positions (bending forward, lying on one side), localized pain that maps to a specific spot rather than diffuse bloating, and a history of multiple treatment failures despite following protocols correctly.

Signs Adhesions May Be Driving Your SIBO

How Adhesions Are (And Aren't) Diagnosed

Adhesions are frustrating because they don't image well. CT scans can identify bowel obstruction caused by adhesions but rarely visualize the adhesions themselves unless they're very large or causing acute problems. MRI enterography is somewhat better for subtle sub-obstructive patterns but still misses many clinically significant adhesions. Ultrasound is useful for specific questions like checking if an organ slides normally over adjacent tissue, and some clinics use dynamic ultrasound to assess organ mobility. The gold standard for definitive diagnosis is diagnostic laparoscopy -- actually looking inside the abdomen with a camera -- but this is invasive and rarely done just for diagnosis. Most patients are diagnosed clinically based on history, symptom pattern, and response to manual therapy.

Clear Passage and the Wurn Technique

Clear Passage is a specialty clinic chain founded by Belinda and Larry Wurn that uses a hands-on manual therapy approach specifically targeted at breaking down adhesions. Their technique, developed over decades, involves deep, sustained manual pressure on areas of restriction, applied in specific directions to slowly break adhesive cross-links. They've published multiple peer-reviewed studies showing the technique improves outcomes in bowel obstruction, infertility from pelvic adhesions, and chronic pelvic pain. A 2015 study in the Journal of Clinical Medical Research specifically looked at their protocol for SIBO and partial bowel obstruction, with reported improvements in symptoms and motility.

The Clear Passage program is intensive -- typically 20 hours of treatment delivered over 5 days (4 hours per day). It's expensive, not covered by insurance, and requires traveling to one of their clinic locations. Patients who do well with the program often report significant improvements in bloating, pain, and recurrent obstruction symptoms. It's not a magic bullet, and not everyone responds, but for patients with documented or strongly suspected adhesion-driven SIBO who have failed other treatments, it's one of the more evidence-backed options. Cost is typically $5,000-8,000 for the full program.

Visceral Manipulation Therapy

Visceral manipulation is a gentler form of manual therapy developed by French osteopath Jean-Pierre Barral. It focuses on restoring normal mobility to internal organs through very light touch and subtle movement. Unlike Clear Passage's deeper approach, visceral manipulation works with the fascial system to encourage tissue to release restrictions over time. Sessions are typically weekly for 6-12 visits, less intense than the Clear Passage program, and often more accessible -- many osteopaths and some physical therapists are trained in it. Results are more gradual. Find practitioners through the Barral Institute directory at barralinstitute.com.

Self-Massage and At-Home Techniques

Not everyone can afford Clear Passage or has access to a visceral manipulation practitioner. Self-massage techniques can help to some degree, particularly for superficial adhesions near surgical scars. The basic approach: using firm fingertip pressure, work directly on and around any surgical scars for 5-10 minutes daily. Move the scar in all directions (up, down, side to side, circular, and pinching), looking for areas of restriction and holding gentle sustained pressure on tight spots until they soften. This is sometimes called scar tissue mobilization, and it's what physical therapists teach post-surgical patients to do at home. For deeper abdominal work, slow clockwise abdominal massage (following the path of the colon) for 5-10 minutes before bed can help overall motility and may modestly loosen fascial restrictions over time.

When Surgery Is the Right Answer

Adhesiolysis -- the surgical cutting of adhesions -- is generally avoided when possible because the act of surgery itself often creates more adhesions. The scar tissue from the adhesiolysis replaces the scar tissue that was removed, and sometimes the new adhesions are worse than the old ones. That said, surgery is sometimes necessary. Clear indications include recurrent complete bowel obstructions, severe pain that's not manageable with other approaches, and strong evidence of a specific surgically correctable lesion. When surgery is done, techniques like the use of anti-adhesion barriers (Seprafilm, Interceed) during the procedure can reduce the risk of new adhesions forming. The decision to pursue surgery for adhesion-driven SIBO should always involve a surgeon experienced in adhesion work and ideally a second opinion.

Endometriosis-Related Adhesions

Endometriosis deserves special mention. Endometrial tissue growing outside the uterus triggers chronic inflammation that produces extensive adhesions, particularly in the pelvis and around the small intestine. Studies have shown a strong association between endometriosis and SIBO -- one study found SIBO in over 80% of endometriosis patients with bloating. For these patients, treating SIBO without addressing the endometriosis often leads to rapid relapse. Excision surgery by an endometriosis specialist (not ablation -- the distinction matters) is the gold standard for treating both the endometriosis and the associated adhesions. Nancy's Nook endometriosis group on Facebook maintains a vetted list of specialist excision surgeons.

Combining Adhesion Treatment with SIBO Treatment

The ideal sequence depends on severity. For patients with mild adhesion involvement, SIBO treatment first (antimicrobials plus prokinetics plus diet), followed by manual therapy to address any residual mechanical restrictions, is reasonable. For patients with severe adhesions causing significant motility problems, addressing the mechanical issue first -- through Clear Passage, visceral manipulation, or in some cases surgery -- before or during SIBO treatment often produces better results. The worst sequence is repeated cycles of antimicrobials alone without ever addressing the underlying mechanical restriction -- which unfortunately describes the treatment history of many adhesion-driven SIBO patients who come to specialists after years of frustration.