Adhesions: when the scar is real but the pain has outlived it.

Scar tissue cannot feel. So why does the ache go on for years? The answer may be in the nervous system, not the abdomen.

This page is about understanding the condition and the role the brain and nervous system can play in it. It is not a diagnosis. Your own clinicians know your case.

What abdominal and pelvic adhesions are

Inside the abdomen and pelvis, the organs are wrapped in slippery membranes so they can slide past each other as you move, breathe and digest. After surgery, infection, endometriosis or any inflammation, the body lays down bands of scar-like tissue called adhesions. These bands can tether loops of bowel to each other, to the uterus or ovaries, or to the inside of the abdominal wall.

Adhesions are extremely common. Most people who have had abdominal surgery develop some, and most never know. In a small number of cases an adhesion can kink the bowel and cause a blockage, which is a medical emergency with vomiting, swelling and an inability to pass gas or stool. That is a real, mechanical, acute problem.

The question this article is about is different: what explains the dull, pulling, cramping or burning pain that goes on for months or years, with scans that show nothing dangerous, and that is blamed on adhesions?

The neuroplastic contribution

The ATNS Index of Neuroplastic Symptoms makes a simple anatomical point: scar tissue has no nerves of its own. An adhesion cannot hurt by itself. It can only cause symptoms if it compromises an organ or the organ's circulation, and when that happens the result is an acute, short-term problem such as an obstruction, not a long-term ache. The index concludes that most chronic symptoms attributed to adhesions most likely come from neuroplastic symptoms instead.

Neuroplastic symptoms are real, physical symptoms produced by learned pathways in the brain and nervous system rather than by ongoing damage in the body. After surgery or a painful illness, the nervous system can stay on high alert. The brain keeps predicting danger in the belly or pelvis and keeps producing pain to protect you, long after the tissue has healed. This is central sensitization: a learned pattern, not imaginary, and learned patterns can be unlearned.

• The original injury was real, and the pain is real now.
• What has changed is the source: the nervous system is now generating the pain, not the scar.
• Because the brain can change, this kind of pain is treatable in a way that scar tissue is not.

What the research shows

The best test of the adhesion theory is to cut the adhesions and see whether pain goes away. That is exactly what a blinded, randomized, multicentre trial did in 2003. About 100 people with chronic abdominal pain and adhesions seen at laparoscopy were randomly assigned either to have the adhesions cut or to have the laparoscopy alone, without knowing which they had received. Both groups improved, and at 12 months there was no meaningful difference between them.

A 2017 systematic review and meta-analysis pooled the trials and observational studies of surgery for adhesion-related chronic abdominal and pelvic pain and found the evidence weak, with randomized trials showing no clear advantage of cutting adhesions over simply looking inside.

A 2026 updated meta-analysis reached the same conclusion with more data. Across four randomized trials, about 39 percent of people improved after adhesiolysis and about 36 percent after diagnostic laparoscopy alone, a difference that was not statistically meaningful. Uncontrolled studies reported higher success rates, which the authors treated as hypothesis-generating only.

So people often get better after an operation, but not because the adhesions were removed. That fits a nervous-system source. To be honest about the limits: no study has directly measured central sensitization in people with adhesion-related pain, so the neuroplastic picture is inferred from these trials rather than proven by them.

Signs the brain may be part of the picture

• The pain began or worsened long after the surgery or infection healed.
• It moves, spreads, or changes character from day to day.
• It flares with stress, poor sleep, worry about the pain, or a busy week, rather than with specific movements or meals.
• You have other sensitized-system symptoms: irritable bowel, pelvic pain, headaches, fatigue, jaw tension or bladder urgency.
• Scans and examinations are reassuring, but the pain is not.
• Previous surgery to free adhesions helped only briefly, or not at all.

A solution that addresses it

There is an approach built for exactly this situation: pain and symptom reprocessing. It starts with education about neuroplastic symptoms. Then it works on the alarm system directly: somatic tracking (observing sensations with curiosity instead of fear), reducing the sense of threat around the pain, a graded return to the activities you have been avoiding, emotional awareness and expression, and acceptance and commitment skills. Trained clinicians deliver it, and digital programs now make it easier to practise every day.

Cindra is a daily AI companion built around these approaches, with daily check-ins, short practices and plain-language lessons for people whose symptoms have a neuroplastic component. If your adhesion pain has outlasted the reasons for it, you can join the waitlist.

What to do next

First, get the mechanical questions answered. Seek urgent care for severe cramping with vomiting, a swollen belly, or not passing gas or stool, which can signal a bowel obstruction. Fever, weight loss or blood in the stool also need prompt assessment.

If those have been ruled out and your clinician cannot find a structural reason for ongoing pain, ask directly whether your symptoms fit a neuroplastic pattern. Then start learning: read about why hurt is not the same as harm, and begin practising the skills that calm a sensitized system. If pelvic pain is part of your picture, our guide to chronic pelvic pain and ACT is a good next read.

This article is for general education and is not medical advice, and it does not diagnose or treat any condition. Persistent symptoms deserve a proper medical assessment to rule out disease or injury before a neuroplastic explanation is considered. If your symptoms are new, changing, or come with red-flag signs such as fever, unexplained weight loss, numbness or weakness, chest pain, or loss of bladder or bowel control, see a clinician promptly.