Yes, abdominal adhesions can cause constipation, and they do so more often than many people realize. Adhesions are bands of scar tissue that form between organs and tissues inside the abdomen or pelvis, and they develop after more than 90% of gynecologic surgeries and 67–93% of general abdominal surgeries. When these bands pull on, kink, or compress sections of the intestine, stool can’t move through normally, leading to constipation that ranges from mild and chronic to a complete blockage.
How Adhesions Slow Your Bowel
Adhesions cause constipation through a straightforward mechanical process. Scar tissue bands can anchor loops of intestine to the abdominal wall, to other organs, or to each other. This tethering limits the bowel’s natural ability to contract and move contents forward. In some cases, the bands create sharp angles or kinks in the intestine, partially narrowing the passage that stool travels through. When enough of the intestinal tube is restricted, transit slows and stool backs up.
On imaging, doctors sometimes see what’s called a “fat-bridging sign,” a cord-like band of tissue forming a connection across the abdominal lining, or a twisting pattern in the tissue that supports the intestines. Both are signs that adhesions are pulling structures out of their normal position. Even when the narrowing isn’t severe enough to cause a full blockage, it can create a bottleneck that makes bowel movements infrequent, difficult, or incomplete.
What Creates Adhesions in the First Place
The most common cause is prior surgery. Any operation that opens the abdominal cavity triggers a healing response, and the scar tissue that forms doesn’t always stay where it belongs. Open gynecologic procedures carry adhesion rates as high as 97%. Procedures like fibroid removal are particularly prone to adhesion formation, with roughly 23–38% of women developing them afterward. Laparoscopic (keyhole) surgeries produce fewer adhesions than open procedures, but they don’t eliminate the risk entirely.
Surgery isn’t the only trigger. Endometriosis is one of the leading non-surgical causes. Endometrial tissue that grows outside the uterus bleeds into the surrounding area during menstrual cycles, sparking inflammation that leads to scar bands forming between organs. These adhesions commonly involve the rectum, physically constricting it and directly contributing to constipation. Women with endometriosis-related adhesions often also experience chronic pelvic pain, pain during intercourse, and bowel obstruction.
Pelvic inflammatory disease (PID), typically caused by chlamydia or gonorrhea infections, can also produce adhesions. PID-related inflammation spreads across the abdominal lining and can create characteristic “violin string” adhesions between the liver, abdominal wall, and bowel. In rare cases, loops of small intestine become trapped in these bands, causing obstruction. For sexually active women who have never had abdominal surgery but develop adhesion-related bowel symptoms, PID is an important possibility to consider.
How This Differs From Ordinary Constipation
Functional constipation, the kind linked to diet, hydration, or lifestyle, tends to respond to fiber, fluids, and over-the-counter remedies. Adhesion-related constipation often doesn’t. That’s because the problem isn’t sluggish muscle contractions or hard stool. It’s a physical barrier that dietary changes can’t remove.
A few patterns can help distinguish adhesion-related constipation from the everyday variety:
- History of abdominal or pelvic surgery: If your constipation started or worsened after an operation, adhesions are a likely contributor.
- Chronic pelvic or abdominal pain: Adhesions can prevent organs from moving freely, producing a deep, visceral ache that comes and goes independent of meals or bowel movements.
- Episodic worsening: Partial obstruction from adhesions can cause intermittent flares where constipation, cramping, and bloating suddenly intensify before easing again.
- Poor response to standard treatments: When fiber supplements, laxatives, and dietary changes don’t make a meaningful difference, a mechanical cause like adhesions becomes more likely.
When Constipation Becomes an Emergency
Adhesion-related constipation can progress from a chronic nuisance to a medical emergency if the bowel becomes fully obstructed. A complete obstruction means nothing, not stool, liquid, or even gas, can pass through. Warning signs include severe cramping abdominal pain that comes in waves, vomiting (especially if it turns green or brown), a visibly swollen abdomen, complete inability to pass gas or have a bowel movement, and loss of appetite. This situation requires immediate medical attention because a trapped section of bowel can lose its blood supply, leading to tissue death within hours.
How Adhesions Are Detected
Diagnosing adhesions is tricky because they don’t show up well on standard imaging. A regular CT scan or ultrasound can reveal the consequences of adhesions, like a dilated loop of bowel upstream from a blockage, but the bands themselves are often invisible. A specialized technique using artificial pneumoperitoneum (injecting a small amount of air into the abdominal cavity before scanning) has shown much better results, with sensitivity reaching 100% and accuracy around 95%, but this approach isn’t widely available or routinely used.
In practice, adhesions are often diagnosed through a combination of your surgical history, symptom pattern, and the process of ruling out other causes. Many adhesions are only confirmed when a surgeon directly visualizes them during a procedure.
Treatment Options
For mild to moderate constipation caused by adhesions, conservative management is the first step. Stool softeners, osmotic laxatives, and careful attention to hydration can help contents move past a partial narrowing more easily. A low-residue diet, which limits high-fiber and bulky foods, may reduce the risk of food getting stuck at a narrowed point, though this should be guided by a provider since it’s the opposite of standard constipation advice.
Soft tissue mobilization, a type of manual physical therapy where a therapist applies targeted pressure and stretching to the abdomen, has shown promising results. A systematic review found preliminary strong evidence that these techniques improve symptoms related to acute post-surgical adhesions, and moderate evidence for chronic adhesions. Patients in the reviewed studies experienced improvements in abdominal function, pain tolerance, and quality of life. This approach won’t dissolve dense scar bands, but it may improve the mobility of organs enough to relieve milder symptoms.
When conservative measures fail or obstruction episodes recur, surgery to cut the adhesion bands (adhesiolysis) becomes an option. This procedure can provide significant relief, but it comes with a fundamental catch: the surgery itself can create new adhesions. One study tracking 478 patients after surgical treatment for adhesion-related small bowel obstruction found a 12.1% recurrence rate over a median follow-up of about two years, with the risk persisting for several years. Other estimates suggest recurrence rates as high as 53% depending on the severity and extent of the original adhesions. Surgeons typically use laparoscopic techniques and anti-adhesion barriers to reduce this risk, but reformation remains a real possibility that should factor into any treatment decision.
Living With Adhesion-Related Constipation
For many people, adhesion-related constipation becomes a condition to manage rather than cure. Paying attention to which foods seem to trigger episodes, staying well hydrated, and maintaining regular physical activity (which promotes intestinal motility) all help. Keeping a symptom diary can be useful for identifying patterns and communicating clearly with your care team about what’s working and what isn’t.
If you’ve had abdominal surgery and your constipation doesn’t respond to the usual remedies, or if you have endometriosis or a history of pelvic infections, adhesions are worth discussing with your provider. The earlier a partial obstruction pattern is recognized, the more options you have before it becomes an emergency.