How we worked out what actually causes this — and what fixes it
We reviewed published gastroenterology guidelines, randomized controlled trials on dietary interventions for functional gastrointestinal disorders, and meta-analyses on the diagnostic yield of structured elimination diets. We specifically looked at evidence quality: not just whether something appeared in a guideline, but whether the underlying trials were well-designed and reproduced. Where official advice and trial evidence diverged, we followed the evidence.
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Clinical guidelines reviewed The American College of Gastroenterology's guidelines on functional dyspepsia and IBS confirm that structured dietary elimination is a first-line diagnostic and therapeutic approach with strong evidence, not just a complementary option.
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Low-FODMAP diet evidence assessed Multiple randomized controlled trials — including a landmark 2014 trial in Gastroenterology by Halmos et al. — demonstrate that a low-FODMAP diet produces clinically meaningful symptom reduction in 50–70% of people with IBS-related post-meal pain, outperforming standard dietary advice.
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H. pylori and structural causes verified Research published in The Lancet and the BMJ confirms that H. pylori eradication resolves dyspepsia in a meaningful subset of sufferers, and that testing for it before defaulting to long-term acid suppression is the evidence-supported pathway — not the other way around.
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Peppermint oil trial evidence reviewed A 2014 meta-analysis in the Journal of Clinical Gastroenterology (Khanna et al.) found enteric-coated peppermint oil significantly superior to placebo for reducing IBS-related abdominal pain, supporting its use as a short-term symptomatic option while investigating causes.
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Red-flag symptoms cross-checked Criteria for urgent investigation were cross-referenced against NICE guideline NG12 (suspected cancer referral) and ACG functional dyspepsia guidelines to ensure we're being accurate — not unnecessarily alarming — about when to seek prompt medical evaluation.
The right approach depends on what's actually causing your pain — here's how to find out and fix it
Because post-meal stomach pain has multiple possible causes — food intolerances, functional disorders, infections, structural issues — the most effective approach varies by person. Here's how to navigate the options based on where you are right now.
What most people try first — and why it doesn't fix the problem
These approaches are popular because they're convenient or widely recommended, but the evidence shows they either don't address the underlying cause or actively delay finding it.
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Taking antacids or PPIs as the default first response — Proton pump inhibitors and antacids are appropriate when acid is the confirmed problem — but consistent post-meal pain is caused by acid in only a minority of cases. Using acid suppression as a catch-all means most people get temporary or no relief while the actual cause (a food intolerance, H. pylori, or functional disorder) goes unaddressed. Long-term PPI use also carries real risks including B12 deficiency, increased infection susceptibility, and rebound acid hypersecretion when stopped.
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Cutting out "healthy" foods at random — Many people cut gluten, then fruit, then caffeine in an unsystematic way and end up unnecessarily restricting their diet without ever confirming what actually triggers their pain. Without a structured elimination and reintroduction protocol, you can't distinguish a real intolerance from a coincidence — and you risk nutrient deficiencies and a worse relationship with food for no diagnostic gain.
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Relying on food intolerance tests from private labs or wellness companies — IgG-based food sensitivity panels — widely sold by private labs and wellness brands — have no validated clinical evidence for diagnosing food intolerances. The NHS, the British Society of Gastroenterology, and multiple systematic reviews have concluded these tests produce misleading results and frequently lead people to cut out foods unnecessarily. The only validated approach for identifying food intolerances is a structured elimination and reintroduction trial.
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Ignoring the problem and hoping it resolves — Consistent pain after almost every meal is your digestive system signalling something is wrong. While some functional symptoms do fluctuate, waiting without investigation means missing conditions — particularly H. pylori infection or early celiac disease — that worsen over time and cause cumulative gut damage if untreated.
What others did
214 community results-
MR
I'd had stomach cramps after meals for about two years and assumed it was stress. Started keeping a food diary properly — writing down exact times and severity — and within ten days it was obvious: every bad episode happened within 45 minutes of eating anything with a lot of onion or garlic. Went low-FODMAP for four weeks, cramps basically disappeared. Reintroduced things one by one and confirmed garlic was the main culprit. Now I just avoid it and I'm fine. The diary was the thing that changed everything.
87 found this helpful -
DK
My GP kept suggesting antacids but they never made any real difference — I knew instinctively acid wasn't the issue because the pain was lower down and more crampy than burning. Eventually pushed for a referral and got tested for H. pylori — came back positive. Two-week course of antibiotics and triple therapy later, the post-meal pain I'd had for three years was almost completely gone. I wish I'd pushed for that test sooner instead of spending two years on PPIs that weren't doing anything.
112 found this helpful -
TN
The low-FODMAP diet helped — my pain went from a 7 to maybe a 4 out of 10. But it didn't go away completely. Turned out I also had delayed gastric emptying that only showed up on a gastric emptying study. So if dietary changes help but don't fully solve it, please don't just stop there — I wish someone had told me that partial improvement after an elimination diet means you might have two things going on, not that the approach failed. Now managing both and feeling significantly better.
64 found this helpful
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