Urgent
Bloating / Motility / SUDD-SIBO Symptom Plan
Abstract
Post-prandial bloating and brief migrating spot pains are best handled as a symptom/motility branch: SIBO/MMC, SUDD/IBS overlap, fermentation load, carbonation/sweetener exposure, visceral sensitivity, or less likely bile-acid diarrhea when watery urgency dominates. This branch does not explain positive stool blood or iron drift. Alcohol-plus-smoking periods now look like a major personal gut/iron-marker destabilizer, so avoidance remains high-value while objective stool-blood and iron questions are unresolved. Use the 30-day logs, meal timing, selective GI testing, and controlled probiotic/fiber trials; avoid broad microbiome chasing and medication escalation without a clinician.
The active pattern belongs in a symptom/motility branch, not the bleeding branch:
prominent post-prandial bloating/distension
brief, low-grade, migrating spot pains, usually seconds to minutes and around 2-3/10
location changes: lower left, lower right, center/lower abdomen, left of belly button, far right, occasional upper-left/chest-tightness note
bloating often around 5-7/10 during pain observations
normalized calprotectin, which weakens active inflammatory colitis/diverticulitis as the main bloating explanation
no documented fever, guarding, persistent same-site pain, visible blood, or hemodynamic bleeding symptoms in the spot-pain observations
Most plausible symptom labels: SIBO/MMC dysfunction, SUDD/IBS overlap, fermentation load, meal stacking, carbonation/diet-soda exposure, coffee sensitivity, visceral hypersensitivity, abdominal-wall/position effects, or alcohol/smoking destabilization. Bile-acid diarrhea stays lower priority unless logs show repeated watery urgency/high-frequency stool. The final-week coffee plan became reduced coffee with logged exceptions, so it is useful context but not a clean no-coffee trigger-removal test.
Boundary rule: SIBO/SUDD/probiotics do not explain positive FOB/stool RBC or iron drift. Positive stool blood, visible blood, Hb/ferritin/TSAT decline, melena, dizziness/faintness, or repeat stool-RBC positivity stay owned by GI Bleeding / Diverticular / Stool Blood and Iron, B12 & Malabsorption.
Gas movement, visceral hypersensitivity, abdominal-wall/position effect, SUDD/IBS/SIBO overlap
Track relation to gas/toilet/posture/walking/meal timing; no panic escalation unless pattern changes
Post-meal pressure/distension, circumference rise, worse after meal stacking/coffee/alcohol/diet soda/carbonation/fermentable load
Fermentation/load, carbonation distension, coffee sensitivity, SIBO/MMC, IBS/SUDD overlap; alcohol-plus-smoking is now a high-suspicion personal destabilizer
Hydrogen/methane breath testing is reasonable only if accessible and if the result would change treatment. Minimum useful result reports hydrogen and methane; consensus anchors: hydrogen rise >=20 ppm by 90 minutes, methane >=10 ppm at any point, with elevated fasting baseline as supportive context.
Glucose breath test has better specificity but may miss distal SIBO. Lactulose can sample distal fermentation but is more transit-confounded. Trio-gas/H2S is nice-to-have, not locally required.
Jejunal aspirate is not a default step.
BAD testing belongs only to repeated watery urgency / IBS-D-like logs, not isolated bloating.
Broad commercial stool microbiome testing is not a core decision tool.
Local access status: no confirmed public Phnom Penh hydrogen/methane SIBO breath-test provider and no confirmed public bile-acid diarrhea test route. Biomed tariff scrape did not show breath/hydrogen/methane/SIBO, SeHCAT, serum C4, FGF19, or fecal-bile-acid testing. Ask a Phnom Penh GI directly before building plans around these tests; Bangkok remains fallback only if a formal result would change treatment.
What to do now
Keep this branch log-driven after the clean experiment: meal timing, 4-5h water-only gaps when practical, no grazing, bloating onset/peak, morning baseline vs post-meal peak maximum-width abdomen circumference, stool pattern/photo, pain location/duration/intensity, walking/toilet/gas relation, weight trend, alcohol/smoking status, coffee/tea type and size, Coke Zero/diet soda/carbonation, and large/stacked meals.
While the diet-soda signal is live, avoid Coke Zero/diet colas rather than using them as coffee/alcohol substitutes. If re-challenged later, test one variable at a time: volume, carbonation, caffeine/cola acid, and non-caloric sweetener are otherwise mixed together.
Use low-risk symptom trials before medications:
meal spacing / no caloric snacks
reduce meal stacking and large boluses
time-limited low-fermentable / modified low-FODMAP trial only if symptoms remain disruptive after the main experiment, with reintroduction rather than permanent restriction
fiber tuning, not fiber fear; psyllium only as a low-start slow-titrate trial if stool regularity/fiber consistency is the target
one probiotic strategy at a time if logs show benefit
Probiotic position:
Probiotics are symptom-management tools for SUDD/IBS-like overlap, not bleeding prevention or general anti-inflammatory therapy.
A broad base probiotic is reasonable only if logs show benefit; do not run multiple probiotics indefinitely because each has a plausible mechanism.
S. boulardii is mainly diarrhea-oriented; rare fungemia risk matters in ICU/central-line/severe immunocompromise settings.
CBM588/Miyarisan is a plausible targeted trial for SUDD-type abdominal symptoms, but only if the exact Miyairi/CBM588 strain can be sourced. Ask for “Miyarisan / Miyairi 588 / Clostridium butyricum CBM588,” product photo, ingredient/strain label, and expiry date. Generic C. butyricum is not automatically the studied strain.
If symptoms persist enough for a GI visit, ask one focused question: can they arrange hydrogen + methane testing, bile-acid testing when watery urgency dominates, or would they manage empirically after red flags and bleeding branch issues are excluded?
What not to do
Do not use SIBO/MMC, probiotics, CBM588, or bloating improvement to explain away stool blood or iron drift.
Do not use CT abdomen/pelvis for routine bloating. Reserve CT for acute diverticulitis/complication signs, severe or persistent focal pain, fever, obstruction, abscess concern, unexplained weight loss, or clinician-directed structural concern.
Do not self-start rifaximin, neomycin, prokinetics, mesalazine, bile-acid sequestrants, or antibiotics for brief migrating 2-3/10 pains. Rifaximin is usually a clinician discussion for hydrogen-predominant SIBO; rifaximin + neomycin is methane/IMO logic but neomycin has ototoxicity/nephrotoxicity concerns; prokinetics such as prucalopride/low-dose erythromycin require interaction/QT review; bile-acid sequestrants can worsen bloating/constipation and bind other medicines/supplements.
Do not make diet permanently restrictive based on one flare. Use short trials with reintroduction.
Do not chase commercial microbiome sequencing, fecal SCFA panels, TMAO narratives, or histamine narratives as core next steps.
Do not stack base probiotic + S. boulardii + CBM588 indefinitely without log-visible benefit.
Do not use NSAIDs for abdominal pain unless a clinician deliberately accepts the bleeding risk.