The trousers fit in the morning. By four in the afternoon they don’t. That’s how one of my patients put it. Not a feeling, but a visible, measurable difference she’d started planning her clothes around.
She’d had bloodwork. She’d had a scope. Everything came back clean, and she was told, kindly and correctly, that there was nothing dangerous going on. She left relieved and quietly deflated at the same time, because both things were true: nothing was wrong, and she still felt like this every single day.
That gap between reassuring and useful is where a lot of people get stranded.
What “normal” actually ruled out
This is the sentence I most want you to have.
A normal endoscopy and normal bloodwork are very good at answering one question: is something damaging your gut? Ulcers, celiac disease, inflammatory bowel disease, cancer. Those tests exist to find structural damage, and when they come back clean, they have done their job.
But bloating usually isn’t a damage problem. It’s a function problem: how your gut moves, how it senses, how the muscles of your abdominal wall respond to a normal volume inside them. A gut can register an ordinary amount of gas as far too much. No scope will show that, because it isn’t damage. No test on that panel was designed to measure it.
Your results weren’t a dead end. They cleared the dangerous list so the real question could finally be asked.
You are not unusual
There’s a study I like here, partly for its findings and partly for how it got them.
According to PubMed (DOI), researchers surveyed 197 adults on the US-Mexico border using formal Rome IV criteria, and 177 of those also completed a set of pictograms. Of that group, 51.4% reported bloating or visible distension. 8.1%, about one in twelve, met criteria for functional bloating as a diagnosis in its own right, a real, named, recognized condition rather than a leftover category.
It’s one community sample, and the authors say the region isn’t typical. They found less gut-brain disorder overall than in the US or Mexico, and more functional bloating. Treat the percentages as local; the next finding travels.
The researchers also handed people pictures, simple drawings of a normal abdomen and a distended one. Thirty percent of the people who said “no” in words said “yes” when shown a picture.
Read that again. Three in ten people with this symptom couldn’t find the language for it, and only reported it when someone showed them an image instead of asking them to describe it.
If you’ve ever struggled to explain this at an appointment and come away feeling like you undersold it, or like you sounded vague, that isn’t you failing to explain yourself. It’s a documented feature of this symptom, and the standard question is bad at capturing it.
The one thing I’d want ruled out first
Before anything else, celiac disease deserves an explicit check rather than an assumption.
According to PubMed (DOI), celiac disease affects roughly 1% of the general population, presents in wildly variable ways, and remains under-recognized. The authors specifically recommend screening people whose presentation looks like irritable bowel syndrome, precisely because the two get confused.
One important practical point, and it comes from the ACG’s diagnostic guideline (DOI) rather than from me: the blood test is only valid if you’re still eating gluten. If you’ve already cut it out because it seemed to help, the test can come back falsely negative. Don’t quietly go gluten-free and then get tested. That sequence costs you the answer.
When you shouldn’t wait
Bloating is usually benign. Some things around it are not. Please get seen promptly if you have any of these:
Unintentional weight loss
Blood in your stool, or black stools
Difficulty swallowing, or persistent vomiting
New, persistent bloating that started after age 50
A family history of ovarian or bowel cancer
Bloating that is constant and progressive rather than fluctuating through the day
Persistent bloating is one recognized presentation of ovarian cancer, and a normal endoscopy doesn’t look at your ovaries, which is why this list is here even if you’ve already been scoped. According to PubMed (DOI), the ovarian cancer symptom index found bloating predicted cancer specifically when it was new within the past year and happening more than 12 days a month. That pattern, not bloating itself.
What actually helps
The best-supported dietary approach is a low-FODMAP diet, a temporary reduction in specific fermentable carbohydrates.
According to PubMed (DOI), a network meta-analysis pooled 13 randomized trials covering 944 patients and ranked it first among all the dietary strategies compared. For bloating and distension specifically, it beat standard national dietary advice (relative risk 0.72, where lower is better).
That’s a real effect from real trials, and I wouldn’t talk you out of it.
But I wouldn’t hand it to you without the rest of the picture either. According to PubMed (DOI), a 2025 systematic review of fourteen randomized trials concluded that while the diet helps selected people, it is not universally necessary. The authors flagged its restrictiveness, the risk of nutritional gaps, and its effects on the gut microbiome as reasons it needs supervision from a dietitian with gastrointestinal expertise. They also noted some people improve with far less drastic changes.
So: a useful tool, often used badly. The low-FODMAP diet is not a way of eating. It’s a way of finding out. You restrict for a short window, then reintroduce foods one at a time in a structured order, and what you learn is which foods are actually driving your symptoms. That reintroduction is the entire point, and it’s the part that gets skipped. The meta-analysis authors flag the same gap: most of those trials never studied it either. Left on the restriction alone and indefinitely, the diet shrinks your life and teaches you nothing.
And it isn’t the only route. According to PubMed (DOI), a 2024 review of functional bloating and distension lists several others: microbiome-directed treatments, neuromodulators, and gut-brain behavioral therapy including CBT. Those authors are candid that strong data are still missing for most of them.
From my own practice, not from that review: most people I see with this do get better. Not by finding one forbidden food, but by working out which mechanism is theirs.
The part I want you to take with you
There is a version of this where you’re told nothing is wrong and you conclude the problem must be you: that you’re sensitive, or anxious, or exaggerating a normal body.
That’s the part I want to change.
“Nothing dangerous” and “nothing happening” are not the same finding. Your tests answered the question they were asked, and the answer was good news. It simply wasn’t the answer to why your afternoons look like this.
The next step isn’t more of the same tests hoping for a different result. It’s a different question: not is my gut damaged, but how is my gut behaving, and what is it responding to?
That question has real answers. It just needs someone to ask it. I’ve written up how I work through gut and digestive symptoms, including what I test for and what “normal” tends to leave unanswered.
This is education, not a diagnosis or a prescription. Talk to your own physician before changing your diet or your care, and please act on the warning signs above rather than waiting.
Want someone to ask the second question? Book a 90-minute consultation.
Sources & Research
All findings retrieved via PubMed.
Bashashati M, Schmulson MJ, Sarosiek I, et al. Disorders of Gut-brain Interaction on the US-Mexico Border: A Survey Using Rome IV Criteria. J Clin Gastroenterol. 2024;58(4):330-336. https://doi.org/10.1097/MCG.0000000000001858
Zingone F, Bai JC, Cellier C, Ludvigsson JF. Celiac Disease-Related Conditions: Who to Test? Gastroenterology. 2024;167(1):64-78. https://doi.org/10.1053/j.gastro.2024.02.044
Rubio-Tapia A, Hill ID, Semrad C, et al. American College of Gastroenterology Guidelines Update: Diagnosis and Management of Celiac Disease. Am J Gastroenterol. 2023;118(1):59-76. https://doi.org/10.14309/ajg.0000000000002075
Goff BA, Mandel LS, Drescher CW, et al. Development of an ovarian cancer symptom index: possibilities for earlier detection. Cancer. 2007;109(2):221-227. https://doi.org/10.1002/cncr.22371
Black CJ, Staudacher HM, Ford AC. Efficacy of a low FODMAP diet in irritable bowel syndrome: systematic review and network meta-analysis. Gut. 2022;71(6):1117-1126. https://doi.org/10.1136/gutjnl-2021-325214
Kuźmin L, Kubiak K, Lange E. Efficacy of a Low-FODMAP Diet on the Severity of Gastrointestinal Symptoms and Quality of Life in the Treatment of Gastrointestinal Disorders — A Systematic Review of Randomized Controlled Trials. Nutrients. 2025;17(12):2045. https://doi.org/10.3390/nu17122045
Crucillà S, Caldart F, Michelon M, Marasco G, Costantino A. Functional Abdominal Bloating and Gut Microbiota: An Update. Microorganisms. 2024;12(8):1669. https://doi.org/10.3390/microorganisms12081669
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