An IBS diary that actually spots patterns

By Petr Nezval, developer of Symp Trac · Updated July 2026 · 4 min read · Not medical advice

Most IBS advice starts with "keep a food diary" — and most food diaries end in frustration, because meals are only one input and rarely act alone or on schedule. A useful IBS diary tracks the gut and the context.

Symptoms first, on a scale

Log the symptoms themselves daily — abdominal pain, bloating, urgency, and stool pattern if you're willing (the Bristol scale exists for a reason). A 0–10 for overall gut severity gives you the trend line; the individual symptoms explain it.

Context beats ingredient-hunting

Alongside the gut, track stress (0–10), sleep quality, and at most one dietary suspect at a time — a FODMAP group, caffeine, alcohol. The gut-brain axis is real: for many people the stress line predicts flares better than any single food, and it only shows when both are in the same chart.

Mind the lag

Gut reactions arrive anywhere from hours to two days after the input. That's exactly the trap from the trigger guide: same-day blame usually misfires. Compare your suspect against symptoms shifted by a day as well — Symp Trac's Patterns automates that comparison once you have two weeks of overlap.

One suspect at a time

Eliminating five foods at once teaches you nothing. Keep the diary running as the baseline, change one variable for two weeks, and let the monthly view judge. Bring that view to your GP or dietitian — the appointment guide shows how to compress it into the visit.

Track it in Symp Trac — a private symptom diary for iPhone & Apple Watch. Two-tap logging, a month on one screen, doctor-ready reports. No account, no ads; the core diary is free.

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